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効力 (こうりょく) Japanese meaning | Kotomora

効こう力りょく

こ

う

りょ

く

Common wordJLPTN2Freq.FrequencyTop 20,000

Meanings

1

noun

effect; efficacy; validity; potency

Refers to the intended effect, power, or legal validity of something such as a medicine, policy, contract, or law.

この薬くすりの効こう力りょくは8時じ間かん続つづきます。
This medicine's effect lasts for eight hours.

新あたらしい法ほう律りつの効こう力りょくは来らい月げつから発はっ生せいする。

The new law will take effect from next month.

Kanji

効merit, efficacy, efficiency
力power, strength, strong

Similar words

効こう果か
効果 is a more general word for effect or result, while 効力 emphasizes efficacy, potency, or legal force.
有ゆう効こう
有効 is an adjective meaning valid or effective, often used for tickets, coupons, or time-limited validity, whereas 効力 is the noun for the power or effect itself.

Etymology

Compound of 効 (effect, efficacy) and 力 (power, strength). The exact historical derivation is uncertain, but the combination naturally yields the meaning 'effective power'.