Roget's Thesaurus: Entry 744 (Compulsion)

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#744. Compulsion.-- N. compulsion, coercion, coaction[obs], constraint, duress, enforcement, press, conscription.

force; brute force, main force, physical force; the sword, ultima ratio[Lat]; club law, lynch law, mob law, arguementum baculinum[obs], le droit du plus fort[Fr], martial law.

restraint &c. 751; necessity &c. 601; force majeure[Fr]; Hobson's choice.

V. compel, force, make, drive, coerce, constrain, enforce, necessitate, oblige.

force upon, press; cram down the throat, thrust down the throat, force down the throat; say it must be done, make a point of, insist upon, take no denial; put down, dragoon.

extort, wring from; squeeze, put on the squeeze; put on the screws, turn on the screw; drag into; bind, bind over; pin down, tie down; require, tax, put in force; commandeer; restrain &c. 751.

Adj. compelling &c. v.; coercive, coactive[obs]; inexorable &c. 739; compulsory, compulsatory[obs]; obligatory, stringent, peremptory.

forcible, not to be trifled with; irresistible &c. 601; compelled &c. v.; fain to.

Adv. by force &c. n., by force of arms; on compulsion, perforce; vi et armis[Lat], under the lash; at the point of the sword, at the point of the bayonet; forcibly; by a strong arm.

under protest, in spite of one's teeth; against one's will &c. 603; nolens volens &c. (of necessity) 601[Lat]; by stress of circumstances, by stress of weather; under press of; de rigueur.

with a gun to one's head.

Phr. I'll make him an offer he can't refuse.