expression, godan verb (-u)
to be considerate; to pay attention to others' needs; to fuss over
Used when someone is mindful of others, worries about inconveniencing them, or goes out of their way to be helpful. Often implies a degree of mental effort or anxiety.
彼はいつも周りに気を使っている。
He is always considerate of those around him.
そんなに気を使わなくていいよ。
You don't need to fuss over me so much.
お客様に気を使って、部屋を暖かくしておいた。
I paid attention to the guests' comfort and kept the room warm.