noun
permanent measure; long-term solution
Refers to a lasting, fundamental countermeasure, as opposed to a temporary fix. Often used in policy, engineering, and business contexts.
洪水を防ぐための恒久対策が急務だ。
A permanent measure to prevent flooding is urgently needed.
この問題には恒久対
This problem requires a long-term solution; a stopgap won't fix it.