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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?

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closed as general reference by mplungjan, Kristina Lopez, tchrist, MετάEd, kiamlaluno Mar 16 '13 at 11:28

This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information.If this question can be reworded to fit the rules in the help center, please edit the question.

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
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

One-time, one-off, and in some situations, one-shot will all fit the bill. Also singleton and nonce.

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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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