un·friend·li·ness /-ˈfrɛn(d)linəs/
Un·friend·ly, a.
1. Not friendly; not kind or benevolent; hostile; as, an unfriendly neighbor.
2. Not favorable; not adapted to promote or support any object; as, weather unfriendly to health.
-- Un*friend*li*ness n.
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unfriendliness
n 1: dislike experienced as an absence of friendliness [ant: friendliness]
2: an unfriendly disposition [ant: friendliness]