of force

Webster's Dictionary (1913)

of unimpaired efficacy; valid; of full virtue; not suspended or reversed. “A testament is of force after men are dead.” Heb. ix. 17.

From the entry Force.

of necessity; unavoidably; imperatively. “Good reasons must, of force, give place to better.” William Shakespeare

From the entry Force.

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54