involuntary : Idioms & Phrases
freedom from involuntary servitude
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noun a civil right guaranteed by the 13th amendment to the US Constitution
WordNet
involuntary muscle
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noun a muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart)
smooth muscle.
WordNet
involuntary trust
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noun a trust created by a court (regardless of the intent of the parties) to benefit a party that has been wrongfully deprived of its rights
constructive trust.