Source : Webster's Revised Unabridged Dictionary (1913)

Alienate \Al"ien*ate\ (-[=a]t), v. t. [imp. & p. p. {Alienated};
   p. pr. & vb. n. {Alienating}.]
   1. To convey or transfer to another, as title, property, or
      right; to part voluntarily with ownership of.

   2. To withdraw, as the affections; to make indifferent of
      averse, where love or friendship before subsisted; to
      estrange; to wean; -- with from.

            The errors which . . . alienated a loyal gentry and
            priesthood from the House of Stuart.  --Macaulay.

            The recollection of his former life is a dream that
            only the more alienates him from the realities of
            the present.                          --I. Taylor.

Source : WordNet®

alienating
     adj : causing hostility or loss of friendliness; "her sudden
           alienating aloofness"