1350-1400;Middle Englishso(b)duen, so(b)dewen < Anglo-French*soduer to overcome, Old Frenchsoduire to deceive, seduce < Latinsubdūcere to withdraw (see subduct); meaning in E (and Anglo-French) < Latinsubdere to place beneath, subdue
presubdue, verb (used with object), presubdued, presubduing.
late 14c., "to conquer," from O.Fr. souduire "deceive, seduce," from L. subducere "draw, lead away, withdraw" (see subduce). The sense seems to have been taken over in Anglo-Fr. from L. subdere. Subduct in the sense of "subtract" is from 1570s.