From The Collaborative International Dictionary of English v.0.48 :
Disaffect \Dis`af*fect"\, v. t. [imp. & p. p. Disaffected; p.
pr. & vb. n. Disaffecting.]
1. To alienate or diminish the affection of; to make
unfriendly or less friendly; to fill with discontent and
unfriendliness.
[1913 Webster]
They had attempted to disaffect and discontent his
majesty's late army. --Clarendon.
[1913 Webster]
2. To disturb the functions of; to disorder.
[1913 Webster]
It disaffects the bowels. --Hammond.
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3. To lack affection for; to be alienated from, or indisposed
toward; to dislike. [Obs.] --Bp. Hall.
[1913 Webster]
From WordNet (r) 2.0 :
disaffect
v : arouse hostility or indifference in where there had formerly
been love, affection, or friendliness [syn: estrange, alienate,
alien]