constraint
con.straint \k*n-'stra-nt\ n [ME, fr. MF constrainte, fr. constraindre] 1a: the act of constraining : the state of being constrained : COMPU LSION; also : RESTRAINT 1b: a constraining agency or force : CHECK 2a: repression of one's own feelings, behavior, or actions 2b: a sense of being constrained : EMBARRASSMENT