効

コウ

き.く、ききめ、なら.う

効, 交, 亠, 父, 力

力

merit, efficacy, efficiency, benefit

効果(こうか): effect; effectiveness; efficacy; result
有効(ゆうこう): validity; legality; availability; effectiveness
効率(こうりつ): efficiency; efficacy; performance; utility factor
無効(むこう): invalid; no effect; unavailable; illegal
効力(こうりょく): effect; efficacy; validity; potency
効く(きく): (1) to be effective; to show effect (2) to do its work; to carry out its function well (3) to be possible to use