Nihoner

“To be effective” in Japanese

Short answer
効く kiku きく

To be effective in Japanese is “効く” (kiku). Full meaning: to be effective, to take effect, to be good (for); to work, to function well; to be possible (to do, use, etc.), to be able to.

Other ways to say “To be effective” in Japanese

甲斐がある kaigaaru to be effective, to be fruitful, to be worthwhile, to be worth, to be rewarded, to pay off 働く hataraku to work, to labor, to labour; to function, to operate, to be effective, to work (i.e. ... works), to come into play; to commit (e.g. a crime), to perpetrate, to do, to act, to practise, to practice 効果を上げる koukawoageru to have an effect, to be effective, to produce a (good) result 効か kika to be effective, to take effect, to be good (for); to work, to function well; to be possible (to do, use, etc.), to be able to 効こ kiko to be effective, to take effect, to be good (for); to work, to function well; to be possible (to do, use, etc.), to be able to 効き kiki to be effective, to take effect, to be good (for); to work, to function well; to be possible (to do, use, etc.), to be able to 効け kike to be effective, to take effect, to be good (for); to work, to function well; to be possible (to do, use, etc.), to be able to 効い kii to be effective, to take effect, to be good (for); to work, to function well; to be possible (to do, use, etc.), to be able to 効こっ kiko to be effective, to take effect, to be good (for); to work, to function well; to be possible (to do, use, etc.), to be able to 効こふ kikou to be effective, to take effect, to be good (for); to work, to function well; to be possible (to do, use, etc.), to be able to 効こう kikou to be effective, to take effect, to be good (for); to work, to function well; to be possible (to do, use, etc.), to be able to

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