constrain
v[Tn, Cn.t]
(fml 文) make (sb) do sth by strong (moral) persuasion or by force 力劝, 强迫(某人)做某事
As an artist he didn´t consider himself constrained (ie restricted) by the same rules of social conduct as other people. 他认为自己是艺术家, 不必像一般人那样要受社会行为准则的束缚.
I feel constrained to write (ie I feel I must write) and complain in the strongest possible terms. 我深感责无旁贷, 必须笔诛墨伐.