有ゆう効こう性せい

noun

validity; effectiveness

Refers to the quality of being valid, effective, or producing the intended result. Often used in formal or technical contexts such as law, medicine, and policy.

• この治ち療りょう法ほうの有ゆう効こう性せいはまだ証しょう明めいされていない。

  The effectiveness of this treatment has not yet been proven.

• 契けい約やくの有ゆう効こう性せいについて弁べん護ご士しに相そう談だんした。

  I consulted a lawyer about the validity of the contract.