1To die down or calm down (a storm, anger, conflict, etc.); to subside and be brought under control.
台風の勢力は夜までに治まった。
The typhoon's strength subsided by night.
会議での論争が一時間ほどでようやく治まった。
The dispute at the meeting finally calmed down after about an hour.
怒りがだんだん治まってきた。
The anger gradually subsided.
2To be at peace; to be well governed or under good control (society, domain, or region).
この地域は長年治まっている。
This area has been peaceful for many years.
国がよく治まることで人々は安心して暮らせる。
When a country is well governed, people can live in peace.
3To subside (of pain or symptoms); to be alleviated or to get better.
薬を飲んだら頭痛がだんだん治まった。
After taking the medicine, the headache gradually eased.
炎症は数日で治まった。
The inflammation subsided in a few days.