drudge

(noun) one who works hard at boring tasks. Synonyms: hack, hacker.

(noun) a laborer who is obliged to do menial work. Synonyms: peon, navvy, galley slave.

(verb) work hard. Synonyms: labor, labour, toil, fag, travail, grind, dig, moil. Examples: "She was digging away at her math homework." "Lexicographers drudge all day long."