Godan verb with ku ending, intransitive verb
1. to be effective; to take effect; to be good (for)See also 薬が効く, usu. 効く
  • この
  • がんやく丸薬
  • しんぞう心臓
  • 効く
  • These pills act on the heart.
2. to work; to function wellSee also 目が利く, usu. 利く for body senses, functions, etc.
  • よくもまあ
  • わたし
  • そんな
  • くち
  • きける
  • How dare you speak to me like that?
3. to be possible (to do, use, etc.); to be able toSee also 割引が効く
  • わたし
  • まん
  • えん
  • まで
  • つけ
  • きく
  • My credit is good for 50,000 yen.
Godan verb with ku ending, Transitive verb
4. to taste (alcohol); to trySee also 聞く
Other forms
利く 【きく】


to talk about this word.