a. Serving or intended to coerce; having power to constrain.

-- Co*er"cive*ly, adv. -- Co*er"cive*ness, n. [ 1913 Webster ]

Coercive power can only influence us to outward practice. Bp. Warburton. [ 1913 Webster ]

Coercive force or
Coercitive force (Magnetism), the power or force which in iron or steel produces a slowness or difficulty in imparting magnetism to it, and also interposes an obstacle to the return of a bar to its natural state when active magnetism has ceased. It plainly depends on the molecular constitution of the metal. Nichol. [ 1913 Webster ]

The power of resisting magnetization or demagnization is sometimes called coercive force. S. Thompson. [ 1913 Webster ]