ungentlemanly
adjective uk/ʌnˈdʒen.tl̩.mən.li/ us/ʌnˈdʒen.t̬l̩.mən.li/
（行为）不礼貌的，不恰当的
(of a man's behaviour) not polite and not behaving well towards other people
He was sent off the pitch for ungentlemanly conduct. 他因行为不当而被罚下场。
Compare: improper (WRONG) inappropriateirregular adjective (RULE) unacceptableunbecomingunsuitable
Opposite: gentlemanly