How to say "cyclic" in Japanese

• サイクリック
  nounA katakana loanword for 'cyclic', but outside scientific and technical vocabulary it is seldom the word you want; for the general sense of something recurring in cycles, 周期的 is the natural choice.
• 周期的しゅうきてき
  na-adjectiveThe adjective to use when 'cyclic' means recurring in cycles or at regular intervals — the 'periodic, cyclical' sense — as with fluctuations or patterns that repeat over time.
  その火山かざんは周期的しゅうきてきに噴火ふんかを繰り返くりかえす。↗

  The volcano erupts at regular intervals.
• 周期性しゅうきせい
  no-adjectiveA noun for the property of being periodic or cyclic — 'periodicity'. Use it where 'cyclic' is nominal, as in 'the cyclic nature of a phenomenon'; for a plain adjective, 周期的 is the word.

For the adjectival sense of 'cyclic' — recurring in cycles — use 周期的; 周期性 is the noun for periodicity itself; 「サイクリック」 is a katakana loanword mostly seen in technical contexts.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• サイクリックcyclic
• 周期的しゅうきてきperiodic
• 周期性しゅうきせいperiodic