8
votes
1answer
408 views

Un-(adjective) but In-(noun) — does it ever go the other way?

Many pairs of words use un- as a prefix for the preferred adjective but in- as a prefix for the preferred noun (e.g. unstable/instability, unequal/inequality, unable/inability, unjust/injustice, ...
15
votes
4answers
11k views

“Instable” or “unstable”?

From my experience, it seems that although unstable is more commonly used, instable is often preferred in engineering and scientific contexts, e.g. "aircraft instability", "instable algorithm". Are ...
6
votes
2answers
2k views

in-able ? un-able?

Suffix -able adds meaning "being able" to a word. I know that. Prefix in- and un- mean "not" or some negative meaning. I know that. However, when it comes to mixing of these, I am confused. ...
4
votes
0answers
362 views

I was wondering why there are multiple prefixes for the same meaning [duplicate]

Possible Duplicate: Why “unequal” but “inequality”? Origins of negative prefixes like in-, un-, il-, ir-, dis-, a- There are a lot of prefixes for meaning ...
1
vote
2answers
27k views

Rule to determine when to use the prefix “im” vs. “un” to negate a word starting with “p”? [duplicate]

Possible Duplicate: Negation prefixes: un-, dis-, a-, in-, … The prefix un is commonly used to negate a word, but is is quite rare with words that start with the letter p; the prefix ...
7
votes
4answers
6k views

Origins of negative prefixes like in-, un-, il-, ir-, dis-, a-

I've read here about origins of in- and un- negative prefixes. Are there any known origins of other negative prefixes such as il-, ir-, dis-, a-?
15
votes
1answer
7k views

Why “unequal” but “inequality”?

The opposite of "equal" is "unequal", yet there is no word "unequality". Why do we use "inequality" instead?
7
votes
4answers
4k views

“Undistinguishable” vs. “indistinguishable”

Is there a difference between these two words? To me, it seems that undistinguishable is more where you can't tell what it is, and indistinguishable seems to be where they're the same. It seems a lot ...
7
votes
3answers
4k views

Are there any patterns to observe in choosing the correct negation prefix to use?

Are there any patterns to observe in choosing the correct prefix to use? There are other prefixes as well, but these are usually the ones I mix up. As in unbelievable, disproportionate, asymmetric, ...