This is the 3068th most frequent Korean word.
효력
Effect or efficacy.
The term '효력' is used to describe the effectiveness or the active power of something, in this case, the medicine's ability to produce desired results.
이 약은 강한 효력을 가지고 있습니다.
This medicine has strong efficacy.
Here, '효력' refers to the validity or enforceability of the contract, stating its legal power is no longer active due to expiration.
그 계약은 만료되어 지금 효력이 없습니다.
That contract has expired and is no longer effective.
In this scenario, '효력' indicates the groundwork or application power of the law as it begins to officially influence or come into effect.