From The Collaborative International Dictionary of English v.0.48 [gcide]:
Uncomfortable \Un*com"fort*a*ble\, a.
1. Feeling discomfort; uneasy; as, to be uncomfortable on
account of one's position.
[1913 Webster]
2. Causing discomfort; disagreeable; unpleasant; as, an
uncomfortable seat or situation.
[1913 Webster]
The most dead, uncomfortable time of the year.
--Addison.
[1913 Webster] -- Un*com"fort*a*ble*ness, n. --
Un*com"fort*a*bly, adv.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
uncomfortably
adv 1: in physical discomfort; "she lay on the couch, her body
uncomfortably twisted" [ant: comfortably]