unfriendly (http://definr.com/unfriendly)

     adj 1: (in combination) not easy to understand or use;
            "user-unfriendly" [ant: friendly]
     2: not disposed to friendship or friendliness; "an unfriendly
        coldness of manner"; "an unfriendly action to take" [ant:
     3: lacking warmth of feeling; "a chilly greeting"; "an
        unfriendly manner" [syn: chilly]
     4: not friendly; "an unfriendly act of aggression"; "an
        inimical critic" [syn: inimical]
     5: very unfavorable to life or growth; "a hostile climate"; "an
        uncongenial atmosphere"; "an uncongenial soil"; "the
        unfriendly environment at high altitudes" [syn: hostile,