Word

時効

じこう
statute of limitations; lapse of rights after a period of time; prescription (including acquisitive and extinctive prescription); ageing; aging
Word

失効

しっこう
lapse; abatement; invalidation
Word

効能

功能
こうのう、くのう
effect; efficacy; virtue; benefit
Word

効用

こうよう
use; utility; effect; benefit
Word

薬効

やっこう
efficacy of a drug or medicine
Word

特効薬

とっこうやく
specific medicine; wonder drug; silver bullet
Word

効率化

こうりつか
making efficient; optimization
Word

効果が上がる

こうかがあがる
to bear fruit; to take effect
Word

奏効

そうこう
efficacy
Word

訴求効果

そきゅうこうか
customer appeal; the power to appeal to customers