効き きき effectiveness #23,725 Also a form of 効く きく stem to be effective N3 Meanings also 利き noun, 効き often refers to medicine effectiveness; efficacy; efficaciousness Its kanji 効 コウ · き.く、ききめ、なら.う merit, efficacy, efficiency, benefit In sentences Furigana その薬くすりの効ききめが現あらわれた。 The medicine took effect. #206315