(1):

(v. t.) To secure by bonds; to chain; to bond or confine; to hold tightly; to constringe.

(2):

(v. t.) To bring into a narrow compass; to compress.

(3):

(v. t.) To violate; to ravish.

(4):

(v. t.) To compel; to force; to necessitate; to oblige.

(5):

(v. t.) To produce in such a manner as to give an unnatural effect; as, a constrained voice.

(6):

(v. t.) To hold back by force; to restrain; to repress.