A hyphen is a symbol used to join two words or two syllables of a single word together. It is not to be confused with dashes or the minus symbol, as these are all longer than the hyphen and serve different purposes in language.

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“5-min” video vs “5 min” video vs “5min” video

Example: Paul and Jake discuss the Frame Timing API in this 5-min video: … Which character (if any) should be put between the number and the word “min”?
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Slashes for hyphens in compound modifiers

Take the phrase "a joint FBI-SFPD task force" for example. According to my boss, a slash can stand in for the hyphen. I tend to disagree. Is this grammatically correct? Stylistically acceptable?
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What's the definition of a “compound noun phrase”?

As I understand it "a very hot day" is not considered a compound noun phrase, but "a too-hot day", "a far-out idea", and "the recently concluded meeting" are. The difference is not just a matter of ...
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1answer
35 views

“It's 20 meters thick” versus “It's a 20-meter-thick layer.”

I know that both of these expressions are correct, but I'd like to be able to explain exactly why the first one is correct. Of course compound adjectives are hyphenated (second expression), but in the ...
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1answer
27 views

Can you leave a hyphen hanging when there is more than one adjective? [duplicate]

When you have 2 adjectives describing one object, do you use 2 hyphens? For example: There are short- and long-form publications.
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2answers
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Should I say “3 half days” or “3 half-days” or “3 half-day”?

Should I say "3 half days" or "3 half-days" or "3 half-day"? I mean I want to refer to, for example, the a.m. of Monday, the p.m. of Wednesday, and the a.m. of Friday, together.
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0answers
29 views

Use of apostrophe or hyphen in money amounts

I'm trying to write a sentence along the lines of "we ordered 200 pounds' worth of stuff", but using the pound sign rather than the word. Possible options: "£200 worth" "£200's worth" "£200-worth" ...
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1answer
85 views

Child-murderer or child murderer?

During an episode of Archer, he criticized a journalist's grammar for her misuse of the word 'child-murderer'. She meant one who murders children, and Archer argued in using the hyphenated form, she ...
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1answer
24 views

Suspended hyphen example

As far as I've seen, it seems like whether or not one should use suspended hyphens is determined on a mostly ad-hoc basis. So, I was wondering if someone could give me advice on whether or not the ...
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1answer
32 views

Closed, open, or hyphenated form for “null-space”

What is the correct spelling of the word "null-space"? Merriam-Webster puts it in a hyphenated form "null-space", (link). Wikipedia (link) and MathWorld (link) both put it in either open or closed ...
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1answer
35 views

Hyphenation of a word to a two-word phrase [closed]

How should one treat the hyphenation of a word to a two-word phrase, such as in the example below: something about the qubit-resonator mode frequency detuning. The sentence tries to express: ...
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2answers
38 views

Correct use of endash in range of minutes

I am currently working as a web developer, and will occasionally be asked to update a website. A "client" just send me an update containing this text: A 15-30-minute waiting-period is required ...
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1answer
46 views

Use of a hyphen when using a noun as an adjective

In my academic work (physics), I often use a noun as an adjective, and this seems to be a common practise to avoid long sentences. For instance sphere packing stands for packing made of spheres. Is ...
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2answers
37 views

Does this open compound noun require a hyphen when used as an adjective?

A friend of mine works at a restaurant that sells tortilla soup; however, I think the soup tastes like hot dogs. There are thus three ways to write this: hot dog soup, hot-dog soup, hotdog soup. Only ...
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2answers
225 views

Use of apostrophe in adjective phrase containing a possessive

I work and write for a tech company that has created many first-in-the-world technologies. In press releases, I often write something like “[Company name] today announced another world’s first with ...
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4answers
17k views

Why does “one half” have no hyphen, but “two-thirds” does?

I often see the fraction ⅔ written with a hyphen, but I never see ½ written with one. Is it correct to have the hyphen in two-thirds, and if so why don't we write one-half?
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3answers
1k views

Hyphenating spelled-out fractions with large numerators and/or denominators

I find myself in the awkward position of needing to systematically spell out fractions where the numerator, the denominator, or both have three or more digits, and I'm not sure about the hyphenation. ...
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1answer
1k views

Fractions as phrasal (compound) adjectives

Is there a difference between a written-out fraction that serves as a noun: He gave me one half of his sandwich. and a written-out fraction serving as an adjective: I gave her a one-half ...
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4answers
88 views

When should hyphens be used to make text clearer

In an earlier post - Phonetic understanding of tongue twisters - a comment was made that "hyphens ...(are) ...not needed in speech, so they must be extraneous". The phrase prompting this assertion ...
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4answers
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“Real time”, “real-time” or “realtime”

Which of real time, real-time and realtime is correct when you are talking about seeing something as it happens?
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1answer
32 views

Intermediate level student or intermediate-level student?

Intermediate level student or intermediate-level student? Which one is more correct/preferable?
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1answer
200 views

Numerical Range with En Dashes & Hyphens (a $3–$5-million-a-year business). Is this punctuated acceptably? [duplicate]

Is this acceptably punctuated? En dashes used between the numbers, and hyphens in the compound modifiers. I believe the two examples below are clear and concise. Do you agree with the punctuation ...
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1answer
558 views

Capitalization and hyphenation for prefixed adjectives derived from proper names in mathematics

In mathematics, it often occurs that the last names of famous mathematicians are used as adjectives with mathematical meaning. Most of these adjectives are written with a capital letter. Then, ...
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2answers
52 views

midteens vs. mid-teens

I'm currently reading an article titled "Workers anxiety in a 'gig economy'" by Noam Scheiber from International New York Times. I came across the paragraph below: Last year, 23 percent of ...
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1answer
32 views

Which word is most correct in this case: re-settle or resettle?

In reference to the word settle as it pertains to the specific definition: Determine; decide on: There is some debate internally on whether to use the word resettle which only has one ...
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1answer
53 views

what's the difference between a hyphen, a dash and a minus sign?

hyphen(-), dash(—), minus(-) What do I use when? and does it really matter? And what's their origin, why did people think they needed another very similar sign?
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1answer
44 views

difference between 'inter-city' and 'intercity' [duplicate]

in academic writing, I always note that 'inter-city' and 'intercity' also appear in a same paper in different context. I was wondering whether the two style have any differences? thanks very much ...
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1answer
32 views

User login or user-login?

I don't have enough reputation to make comments on this site (what a weird system), so I have to make this a question on its own. I am referencing an answer made to another question about the ...
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2answers
1k views

“adjective noun noun”: which noun does the adjective refer to (“electrical system operators”) [duplicate]

Possible Duplicate: How does the hyphen change the meaning in expressions like “high performance” and “high-performance”? Is there a grammar rule behind the hyphen in the phrase 'one-act play'? ...
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3answers
95 views

easy-going vs easy going

Which one is correct: Clive never worries. He's really easy-going. OR Clive never worries. He's really easy going. As per my understanding, hyphen comes between compound adjectives if ...
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3answers
62 views

Using hyphen to avoid repeating a word

In Finnish, 'linja-auto' is a bus, and 'rekka-auto' is a truck. If I were to write that I traveled with both I would write Matkustin linja- ja rekka-autolla. The sentence is equal to ...
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5answers
2k views

What word to choose as the opposite of “self-aware”?

What word would describe the quality of not being self-aware? unselfaware unself-aware un-selfaware un-self-aware non-self-aware I am aware that it is allowed to have multiple hyphens in a word. ...
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0answers
49 views

Where to put the hypen (if any) in “status quo oriented”?

Writing the following sentence, During the negotiation of both regulations, bargaining power was distributed in favour of the status quo oriented states. I wonder where to put a hyphen, if ...
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3answers
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What's the double hyphen after greetings in emails?

I usually see just format in the emails I receive daily: Hello Dorian-- I'm calling you in regard with the something... Thanks, I see comma after the greetings too but I am not sure ...
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3answers
13k views

Usage of hyphen in “oft-cited”

The oft-cited first sentence of this work Why would you not just use two words, oft cited?
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1answer
57 views

Using a hyphen when describing measures (e.g., a 300-meter asteroid) [duplicate]

Here's some examples. Please tell me which ones are right, and which ones are wrong, and why. "A 350-meter asteroid impacted the Moon." "A 350-meters asteroid impacted the Moon." "A 350 meter ...
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4answers
251 views

Hyphenation of tidally enhanced wind mass loss

I am correcting my thesis on stellar evolution, and I was wondering what the correct hyphenation of 'tidally enhanced wind mass loss' is. The meaning of it should be mass loss originating from a wind, ...
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0answers
49 views

How to use hyphen to form new adjectives?

Writing a chemistry paper I need to form an adjective for the following concept: TiO2 rich in oxygen vacancies. Is this the proper formation for an adjective intended to mean that?: ...
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1answer
44 views

Correct use of hyphens [duplicate]

I am writing a thesis on "Service oriented architectures in safety-critical systems" and this is right where the problem starts. I am a bit curious about the use of hyphens in "service oriented" and ...
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3answers
10k views

Which is correct, “on-line” or “online”?

I am still seeing uses of on-line, though I think it is incorrect. For example: A web browser enables a user to go on-line/online. Can you tell me which is the more appropriate to use, on-line ...
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1answer
65 views

Non-residential vs non–residential (short or long hyphen) [duplicate]

Should there be a short or long hyphen separating the two words? Non-residential vs non–residential
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1answer
76 views

Mandatory usage of Hyphens?

I have a question regarding the use of hyphens. My native language is German, and there is a set of rules regarding hyphenation. There are mandatory and optional rules for it. Now, Consider the ...
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2answers
79 views

use of hyphens in a compound adjective

I'm currently reading "Assuming a mantle of power" from International New York Times (May 14, 2015), and the article is about a soft power look that female leaders are donning, with pencil skirts and ...
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3answers
69 views

Is “UTF-8-encoded” an overuse of hypens? Does “UTF-8 encoded” require a hyphen?

After reading usage of the phrase "UTF-8 encoded" ("UTF-8-encoded) at, for example, stackoverflow.com, in Howto identify UTF-8 encoded strings, and in an excerpt ...every character can be UTF-8 ...
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0answers
17 views

Prefix hyphen and another prefix hyphen [duplicate]

In a sentence reading peri- and post-stimulus is the first hyphen necessary? If not, what alternative structure should be used?
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1answer
48 views

Can I use hyphens after two separate words, using “and” as a connector?

I'm writing a Cover Letter and I'm including the following sentence: "Furthermore, I have a passion for dealing with- and meeting- new people." I recall an English professor suggesting something ...
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2answers
1k views

When to use a hyphen to coin a new word and when to omit a hyphen?

Someone has asked for answer to these topics. However, I still want someone to provide me with simple and universal answers. I recently read a sentence from the English-speaking person. It is in an ...
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Are 'short circuited' and 'short-circuited' both correct? [closed]

Are 'short circuited' and 'short-circuited' both correct? On some sites it is written as 'short circuited' ( http://www.physlink.com/Education/AskExperts/ae470.cfm ) and on some other sites it is ...
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2answers
931 views

“Almost-finished” versus “almost finished”

I am attaching an almost-finished version of the report. I am attaching an almost finished version of the report. Which is the preferred form, (1) or (2)? Why?