なお
naoru

Godan Verb (ru)

1. to get better; to get well; to recover (from an illness); to be cured; to be restored; to heal

Intransitive
週間 しゅうかんもすれば自然 しぜん なおります。
nishūkammo sureba shizenni naorimasu.
It will go away by itself in two weeks.