WordWeb Online

1. Conducive to or feeling mental discomfort
   "this kind of life can prove disruptive and uncomfortable"; "the uncomfortable truth"; "grew uncomfortable beneath his appraising eye"; "an uncomfortable way of surprising me just when I felt surest"; "the teacher's presence at the conference made the child very uncomfortable"
    
2. Providing or experiencing physical discomfort
   "an uncomfortable chair"; "an uncomfortable day in the hot sun"

See also: awkward, bad, comfort, comfortableness, comfortless, disquieting, ill at ease, ill-fitting, irritating, miserable, painful, self-conscious, tough, uncomfortableness, uncomfortably, uneasy, warm, wretched

Antonym: comfortable