permanent ceasefire
A formal term used in diplomatic, military, and news contexts for a lasting halt to hostilities.
The two countries agreed to a permanent ceasefire.
The UN is aiming to achieve a permanent ceasefire.
Compound of 恒久的 (permanent) + 停戦 (ceasefire). 恒久的 is from 恒久 (permanence) + 的 (-like), and 停戦 is from 停 (stop) + 戦 (war).