Home/JLPT N3/Vocabulary/効く効くN3🔊☆ Save to listきくMeaning—Kanji in this word効Example sentences私は５万円までつけがきく。My credit is good for 50,000 yen.よくもまあ私にそんな口がきけるね。How dare you speak to me like that?この丸薬は心臓に効く。These pills act on the heart.Related words逆効果効果効果的効能効用効率効率的効力