Something that is constrained is highly or severely restricted. Something in captivity is confined. Constrained captivity is basically highly restricted confinement. Prison would be an example of constrained captivity and so would zoos or animal shelters.

The word constrained carries a meaning of being limited from expressing one's self truly. Being constrained is synonymous with being in a repressed state of emotion or action.

Some synonyms for constrained are restrained, bound, chained, shackled, imprisoned, or compelled.

Type your answer here...When the motion between the elements,forming a pair is such that the constrained motion is not completed by itself,but by some other means,then the motion is said to be successfully constrained motion