When I was struck, my involuntary reaction was to strike back at once. At the mention of his name she gave an involuntary start.
Advanced English Dictionary
+adjective 1 an involuntary movement, etc. is made suddenly, without you intending it or being able to control it: an involuntary cry of pain Antonym: VOLUNTARY 2 happening without you wanting it to: the involuntary repatriation of immigrants + involuntary childlessness involuntarily adverb
Random quote: Those who are blessed with the most talent don't necessarily outperform everyone else. It's the people with follow-through who excel.: Mary Kay Ash