unfriendly

Adjective
  1. Not easy to understand or use (synset 301081866)
    "user-unfriendly"
  2. Not disposed to friendship or friendliness (synset 301080481)
    "an unfriendly coldness of manner"; "an unfriendly action to take"
  3. Not friendly (synset 301249262)
    "an unfriendly act of aggression"; "an inimical critic"
  4. Very unfavorable to life or growth (synset 301246247)
    "a hostile climate"; "an uncongenial atmosphere"; "an uncongenial soil"; "the unfriendly environment at high altitudes"

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