assouplir

Etymology
From.

Verb

 * 1)  to soften make softer
 * 2)  to make more supple
 * 3)  to relax of e.g. a law or rule make less strict
 * 4)  to soften up, get soft become softer
 * 5)  to become more supple
 * 6)  to become relaxed, relax become less strict
 * 7)  to limber up