Japanese word

効力

Pronunciation

Romajikōryoku

Meaning

  • nouneffect

Example

この薬は効力が長く続きます。ko no kusuri wa kō ryoku ga naga ku tsuzu ki ma su

This medicine remains effective for a long time.

Illustration for 効力 (effect)

More examples

この薬の効力は、数時間で弱まります。ko no kusuri no kō ryoku wa sū ji kan de yowa ma ri ma su

The effect of this medicine weakens after a few hours.

Core concept

Describes the force that makes an action, substance, rule, or provision produce its intended effect.

Common phrases

  • 効力があるkō ryoku ga a ru

    be effective

  • 効力を発揮するkō ryoku o hak ki su ru

    exert an effect

  • 効力を失うkō ryoku o ushina u

    lose efficacy

Similar words

効果kōka: The result or change produced by an action, substance, or condition.
有効性yūkōsei: The degree to which something successfully produces its intended effect.
効能kōnō: The stated beneficial effect or use of a medicine or treatment.

Definition in Japanese

物事や決まりなどが実際に働き、結果をもたらす力。mono goto ya ki ma ri na do ga jis sai ni hatara ki kek ka o mo ta ra su chikara

Word origin

効力 (kōryoku, "effectiveness") is a Sino-Japanese compound of 効 (kō, "effect") and 力 (ryoku, "power"), meaning the power that makes something work.

Usage tips

  • In legal English, validity often concerns whether a rule or agreement has force, while 効力 (kōryoku) focuses on the effect or force that it actually has.

Other meanings

  • efficacynoun
  • potencynoun
  • validitynoun

Opposites

Word lists with this word