Hypertext Webster Gateway: "Efforce"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Efforce \Ef*force\, v. t. [imp. & p. p. {Efforced}; p. pr. & vb.
n. {Efforcing}.] [OF. esforcier (F. s'efforcer to exert one's
self), LL. exforciare; L. ex + fortis strong. See {Force}.]
To force; to constrain; to compel to yield. [Obs.] --Spenser.
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