na-adjective, noun
unsociable; unfriendly; blunt; surly; curt; cold; brusque
Describes a person's manner or attitude as lacking warmth, being short, or not engaging socially. Often used for someone who is not actively hostile but simply unapproachable or dismissive.
あの店員はいつも無愛想で、感じが悪い。
That clerk is always unfriendly and gives a bad impression.
彼は無愛想な返事をして、すぐに立ち去った。
He gave a curt reply and left immediately.