periodic

/ˌpɪəriˈɒdɪk/ (bre, ipa) · /ˌpɪriˈɑːdɪk/ (ame, ipa) · /ˌpir-ē-ˈä-dik/ (ame, mw)

periodic — adjective

  • periodicpositive
  • more periodiccomparative
  • most periodicsuperlative

1. coming or being done again after set or fairly even gaps in time.

1.形容詞C1
釋義

coming or being done again after set or fairly even gaps in time.

例句

The clinic sends periodic text reminders before each dental checkup.

collocation: periodic reminder / notice / update

Periodic updates were posted on the school website each Monday.

passive: periodic updates were posted

同義詞
  • regular

    broader and often stronger; can describe routines, habits, or rules, not only repeated timing

  • recurring

    neutral; means coming back again, with less emphasis on even spacing

  • recurrent

    more formal; especially common for problems, symptoms, or fears that return

  • cyclical

    more technical; stresses movement through a repeating cycle

反義詞
  • irregular

    happening without an even pattern or fixed spacing

  • occasional

    happening only now and then, usually without a clear cycle

  • continuous

    continuing without breaks, rather than returning in separate stages

文法句型

periodic + noun

用法筆記

Usually appears before a noun, as in 'periodic reviews', 'periodic checks', and 'periodic payments'. Distinguish it from 'occasional', which suggests irregular timing, and from 'continuous', which means without stopping.

常見錯誤

❌We meet periodic to discuss the budget.
✅We meet periodically to discuss the budget.
💡After a verb, use the adverb 'periodically', not the adjective 'periodic'.
❌Her visits are occasional because she comes every Saturday.
✅Her visits are periodic because she comes every Saturday.
💡'Periodic' suggests a repeated pattern; 'occasional' suggests no clear schedule.