godan verb (-ru), intransitive verb
Intransitive verb describing something that was tight, tense, or strict becoming looser, more relaxed, or less severe. Often used for physical things like knots, screws, or muscles, as well as abstract things like rules or discipline.
靴ひもが緩まってきた。
My shoelaces have come loose.
緊張が緩
The tension eased.
規制が緩まった。
The regulations were relaxed.