To grow old; to become elderly. (A somewhat old-fashioned expression.)
彼は最近急に年寄って見える。
He has started to look suddenly older recently.
年寄らないように、健康に気をつけている。
I try to take care of my health so I don't age quickly.
年寄るのを怖がらず、前向きに暮らしたい。
I want to live positively without fearing getting older.