Drudge

Part of speech: noun (n.)

One who drudges; one who works hard in servile employment; a mental servant. Milton.

Part of speech: verb (v.)

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.

Part of speech: verb (v.)

To consume laboriously; -- with away. Rise to our toils and drudge away the day. Otway.