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A sample sentence would be:

Why did you ban me without providing a reason?

Is there a single word to replace "without providing a reason" with? Indiscriminately is not an option for me.

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There is a difference between doing something for no reason and doing something for a reason that is not disclosed. Your title says one thing and your sentence the other. –  Oldcat May 19 at 20:30
The post does seem somewhat contradictory. To avoid any confusion, I meant the former. –  Nick May 19 at 20:39
Then "Why did you ban me without cause" or "without reason" seem fine at any level of formality. –  Oldcat May 19 at 20:41
Yes, but you probably didn't read what I initially asked for; "is there a word for...". I've also tagged the question as a single-word-request one. –  Nick May 19 at 20:42
Please edit your title, (you could ask in chat for advice) it IS different from the example you have given. –  Mari-Lou A May 20 at 4:16

11 Answers 11

up vote 11 down vote accepted

Unjustifiably comes to mind: a reason is needed to justify an action. Or possibly perversely. Or unreasonably.

unjustifiable : Not able to be shown to be right or reasonable

perverse : Showing a deliberate and obstinate desire to behave in a way that is unreasonable or unacceptable

unreasonable : Not guided by or based on good sense

However, without providing a reason doesn't mean that there isn't one and the ban cannot be justified.

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Interesting. I feel as if the last word fits the context correctly. –  Nick May 19 at 20:40
@Nick If you like an answer, upvote. If you decide to use an answer, accept. You get rep too. –  Andrew Leach May 19 at 20:43
I am waiting to see if any other answers show up that may be better than this one. Also, I can't upvote. –  Nick May 19 at 20:44
Ah. Forgot, sorry. –  Andrew Leach May 19 at 20:50
Maybe these suggestions work for you, but this is not quite the right answer to the stated question. These words imply that the moderator had a reason, and that the reason was a bad one. In contrast, @Wayfaring's top-voted answer (arbitrary, capricious) expresses the sentiment that the ban was not based on any consistent thought process. –  200_success May 20 at 13:20

Your action in banning me was arbitrary and capricious, you'll be hearing from my solicitors shortly.

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Ha! That level of formality is perfect. I can see myself using this in the near future. –  Nick May 19 at 20:48
+1 Jackie would have used these words too! –  RyeɃreḁd May 19 at 22:44

Consider gratuitously and unwarrantedly for "without any reason," and "unexplainedly" for without providing a reason.

gratuitous: being without apparent reason, cause, or justification.

unwarranted: without a basis for reason or fact; unjustified.

unexplainedly: without explanation.

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+1 for gratuitously. +1 for unwarranted too but -1 for "unexplainedly" (my spell checker agrees with me) Total= 1 –  Mari-Lou A May 20 at 3:54
@Mari-LouA: Eh.. Spell checkers can only be so comprehensive. The word is formed according to established rules, and i've heard it in use. –  cHao May 20 at 17:57
@chao how can unexplainedly make sense as an adverb? "He unexplainedly left"? It sounds awkward and ugly, but I am an ancient thing, and new words and workarounds appear constantly. –  Mari-Lou A May 20 at 18:21
@Mari-LouA: It's less awkward if you pronounce it un-ex-plain-ed-ly rather than un-ex-plained-ly. It's still a bit of a mouthful, but so are most of the other suggestions. And it's just as much a word as "undoubtedly". –  cHao May 20 at 19:13

I would say that your banishment was -

  • groundless
  • baseless
  • reasonless
  • prejudiced
  • irrational
  • nonsensical
  • unsubstantiated
  • and without consideration

Sorry if I copied any words from other answers, I was getting into my Jackie Chiles zone.

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Who is Jackie Chiles? Yes, I know. Google it. sigh EDIT youtube.com/watch?v=jpcEietIoxk Very funny :) Thanks. –  Mari-Lou A May 20 at 3:56
@Mari-LouA - I was trying to see how many I could come up without looking anywhere. I had more but they were iffy. Everything on Seinfeld is funny! –  RyeɃreḁd May 20 at 4:06
and without cause... –  mxyzplk May 20 at 4:17
@mxyzplk - or without merit. Merit is a Jackie word. I should have gotten both of those. –  RyeɃreḁd May 20 at 4:48
All of those are great except prejudiced, which would mean that the decision maker had a reason for banning the person. –  IQAndreas May 21 at 2:55

You may write:

  • On what account did you ban me?
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Helpful. But it would be more convenient if that was contracted into a single word. –  Nick May 19 at 20:45
Contracted to one word: Onwhataccountdidyoubanme? –  andy256 May 19 at 23:27

ideas: unnecessarily, unprovoked

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I happen to like wantonly in this instance, but only because the motives are unknown.

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I would like to submit the word randomly for "without any reason."

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I guess randomness has to do about being unpredictable rather than being reasonless. –  WYSIWYG May 21 at 7:46

"Irrationally", I guess, would best describe "without any reason".

Your act of banning me was irrational.


You acted irrationally by banning me.

"Ridiculously", also may be used in this context but it does not communicate the meaning as strongly.

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I am not sure how one would way measure the formality of these.

  • Lacking Jurisprudence
  • Sans scriptura (religious context)
  • Hakuna matata
  • Impertinent
  • Impetuous
  • Unscrupulous
  • Unsystematic
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protected by RegDwigнt May 23 at 20:04

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