constrain
Cross references: 1. force con.strain \k*n-'stra-n\ \-'stra--n*d-le-, -'stra-n-dle-\ vt [ME constrainen, fr. MF constraindre, fr. L constringere to c]onstrict, constrain, fr. com- + stringere to draw tight - more at STRAIN 1: COMPEL 2: to force or produce in an unnatural or strained manner {a ~e d smile} 3: to secure by or as if by bond : CONFINE 4: to bring into narrow compass; also : to clasp tightly 5: to hold back by force; - con.strained.ly av