unsociably

from WordNet (r) 3.0 (2006)

unsociably
    adv 1: in an unsociable manner; "the new neighbors behave quite
           unsociably" [ant: {sociably}]

from The Collaborative International Dictionary of English v.0.48

Unsociable \Un*so"cia*ble\, a.
   Not sociable; not inclined to society; averse to
   companionship or conversation; solitary; reserved; as, an
   unsociable person or temper. -- {Un*so"cia*ble*ness}, n. --
   {Un*so"cia*bly}, adv.
   [1913 Webster]