Attentive; tactful — showing consideration and thoughtful attention to others' feelings or needs.
あの店員は気の利く対応で、忘れ物にもすぐ気づいてくれた。
That clerk was very attentive and noticed my forgotten item right away.
会議で気の利く発言をしたおかげで場の空気が和んだ。
Thanks to a tactful remark in the meeting, the atmosphere relaxed.
気の利く先輩は、入社したばかりの僕に色々教えてくれた。
My considerate senior taught me many things when I first joined the company.
Tasteful; smart — showing good taste or a clever, stylish touch.
あの店は気の利く内装で居心地がいい。
That café has a tasteful interior and is comfortable.
彼女は気の利くプレゼントを選ぶのが上手だ。
She is good at choosing thoughtful, stylish gifts.
気の利くひと言でその場がまとまった。
A smart, well-timed remark settled the situation.