definition of
unfriendly

[1] #1 unfriendly a. not easy to understand or use; "user-unfriendly". wn

[2] #2 unfriendly a. not disposed to friendship or friendliness; "an unfriendly coldness of manner"; "an unfriendly action to take". wn

[3] #3 unfriendly s. [inimical] not friendly; "an unfriendly act of aggression"; "an inimical critic". wn

[4] #4 unfriendly s. [hostile, uncongenial] very unfavorable to life or growth; "a hostile climate"; "an uncongenial atmosphere"; "an uncongenial soil"; "the unfriendly environment at high altitudes". wn