a. rare. [f. prec. + -ABLE.] That can be constrained, liable to constraint.

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1594.  Hooker, Eccl. Pol., I. (1632), 73. They are now by vertue of humane law become constrainable, and if they transgresse, punishable. Ibid., VI. iv. § 11. Before Novatian’s uprising, no man was constrainable to confess publicly any sin.

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