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What is the antonym of recurrent? This is like I have to few activities which I have to perform each month so these are recurrent but there are few activities which I only perform once. So what should I say this activity is recurrent and that activity is one time? What is the proper word in this situation?

  • The most direct and obvious answer for an active that occurs just one time is a one-time activity, or a one-shot one. But isn’t that already in your question? – tchrist Mar 15 '13 at 16:07
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    Question seems to be wrongly phrased. Why are you assuming that the word you are looking for would be an antonym of "recurrent"? – Mohit Mar 15 '13 at 16:35
  • One-off – mplungjan Mar 15 '13 at 16:39
  • Also, 'ad hoc'. – Mitch Mar 15 '13 at 18:01
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One-time, one-off, and in some situations, one-shot will all fit the bill. Also singleton and nonce.

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You could try isolated or one-off.

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  • seldom
  • infrequent
  • non-periodic (not a good one but can be usable in certain situations)

I think there can be multiple words that can be used depending on how you like it.

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