also: ちする
suru verb (special), intransitive verb
be cured; be healed
Intransitive use: the subject (illness, wound) gets better. Rare; modern Japanese prefers 治る or 癒える.
傷が治するまで安静にしてください。
Please rest until the wound heals.
Transitive use: someone cures a disease or heals a wound. Rare; modern Japanese prefers 治す.
医者が病を治する。
The doctor cures the illness.