効く（きく）
JLPT N5 · Godan verb (Group 1)
Pitch accent: heiban (flat) — starts low, stays high, no drop
Meaning: to be effective
Conjugation
| Form | Japanese | Reading |
|---|---|---|
| masu-form (polite) | 効きます | ききます |
| te-form | 効いて | きいて |
| ta-form (past) | 効いた | きいた |
| nai-form (negative) | 効かない | きかない |
| potential form | 効ける | きける |
See the full conjugation table for "効く" →
Example sentences
- この薬は頭痛によく効く。 — This medicine works well for headaches.
- 先生のアドバイスがとても効いた。 — The teacher's advice really made a difference.
Related words
See it used in real works
- Example sentences from Japanese novels & web fiction (Massif)
- Hear “効く” pronounced in real videos (YouGlish)