not disposed to friendship or friendliness; "an unfriendly coldness of manner"; "an unfriendly action to take" not easy to understand or use; "user-unfriendly" not friendly; "an unfriendly act of aggression"; "an inimical critic
If you describe a person, organization, or their behaviour as unfriendly, you mean that they behave towards you in an unkind or rather hostile way. It is not fair for him to be permanently unfriendly to someone who has hurt him People always complain that the big banks and big companies are unfriendly and unhelpful Judy spoke in a loud, rather unfriendly voice. friendly
very unfavorable to life or growth; "a hostile climate"; "an uncongenial atmosphere"; "an uncongenial soil"; "the unfriendly environment at high altitudes"