効力 (こうりょく) Japanese meaning | Kotomoraこの薬の効力は8時間続きます。
This medicine's effect lasts for eight hours.
The new law will take effect from next month.
Usage patterns
〈物〉が効力を持つfor something to have (legal) effect or validity
This contract will take effect starting next month.
効力を発揮するto exert one's effect or potency
The new medicine takes effect within a few hours.
効力を失うto lose effect or validity
This passport will lose its validity next year.
効力が生じるfor (a law, rule, etc.) to come into effect
This law comes into effect 30 days after its promulgation.
効力を停止するto suspend the validity or effect (of a rule, license, etc.)
The court suspended the validity of that regulation.
〈物〉に効力があるto be effective against/for something
This medicine is effective against headaches.
