JLPT N1
衰える
おとろえる
to become weak; to decline; to wear; to abate; to decay; to wither; to waste away
Example Sentence
専門家は衰える方法を説明した。
The expert explained how to become weak.
おとろえる
to become weak; to decline; to wear; to abate; to decay; to wither; to waste away