Drudge \Drudge\, v. i. [imp. & p. p. Drudged; p. pr. & vb. n. Drudging.]

[OE. druggen; prob not akin to E. drag, v. t., but fr. Celtic; cf. Ir. drugaire a slave or drudge.]

To perform menial work; to labor in mean or unpleasant offices with toil and fatigue.

He gradually rose in the estimation of the booksellers for whom he drudged. --Macaulay.

Source: Webster's Revised Unabridged Dictionary (1913)