not inclined to society or companionship; "an unsociable nature...shy and reserved"; "generally unsociable except with intimate friends"; "unsociable behavior"; "an unsociable neighborhood"
not subject to the control of the will; "involuntary manslaughter"; "involuntary servitude"; "an involuntary shudder"; "It (becoming a hero) was involuntary. They sank my boat"- John F.Kennedy
controlled by the autonomic nervous system; without conscious control; "involuntary muscles"; "gave an involuntary start"