The Collaborative International Dictionary of English v.0.48:
Subjugate \Sub"ju*gate\, v. t. [imp. & p. p. Subjugated; p.
pr. & vb. n. Subjugating.] [L. subjugatus, p. p. of
subjugare to subjugate; sub under + jugum a yoke. See
To subdue, and bring under the yoke of power or dominion; to
conquer by force, and compel to submit to the government or
absolute control of another; to vanquish.
He subjugated a king, and called him his "vassal."
Syn: To conquer; subdue; overcome. See Conquer.