1) 効きく #1,509 Inflections of 効く Class Godan verb Stem Inflected ending ✕ Link copied! Common N3 Pitch accent き く [0] Heiban Meaning 1 English · JMdict Godan verb Intransitive verb to be effective; to take effect; to be good (for) usu. 効く See also: 薬が効く (くすりがきく) この丸薬がんやくは心臓しんぞうに効きく。 These pills act on the heart. 2 English · JMdict Godan verb Intransitive verb to work; to function well usu. 利く for body senses, functions, etc. See also: 目が利く (めがきく) よくもまあ私わたくしにそんな口くちがきけるね。 How dare you speak to me like that? 3 English · JMdict Godan verb Intransitive verb to be possible (to do, use, etc.); to be able to See also: 割引が効く (わりびきがきく) 私わたくしは5万ごまん円えんまでつけがきく。 My credit is good for 50,000 yen. More Kanji 利 リ profit, advantage, benefit Forms 効く#1,509効きくきく#2,609きく利く#3,006利きく Learn this word with smart reviews that adapt to you Save word