adjective, un·friend·li·er, un·friend·li·est.

  1. not amicable; not friendly or kindly in disposition; unsympathetic; aloof: an unfriendly coldness of manner.
  2. hostile; antagonistic: an unfriendly act of aggression.
  3. unfavorable; inhospitable or inimical, as an environment: an unfriendly climate for new ideas.


  1. in an unfriendly manner.

adjective -lier or -liest

  1. not friendly; hostile
  2. unfavourable or disagreeable


  1. rare in an unfriendly manner

adj.early 15c., “not characteristic of friends,” from un- (1) “not” + friendly. Cf. Middle Dutch onvriendelijc, Middle High German unvriuntlich, German unfreundlich. Meaning “hostile, inimical” is recorded from late 15c. Related: Unfriendliness.

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