GRIND

I. verb (ground; ~ing) Etymology: Middle English, from Old English ~an; akin to Latin frendere to crush, ~ Date: before 12th century transitive verb to reduce to powder or small fragments by friction (as in a mill or with the teeth), to wear down, polish, or sharpen by friction , 3. oppress , harass , to weaken or destroy gradually, 4. to press together with a rotating motion , to rub or press harshly , to operate or produce by turning a crank , intransitive verb to perform the operation of ~ing, to become pulverized, polished, or sharpened by friction, to move with difficulty or friction especially so as to make a grating noise , drudge , to rotate the hips in an erotic manner, ~ingly adverb II. noun Date: 13th century 1. an act of ~ing, the sound of ~ing, 2. dreary, monotonous, or difficult labor, study, or routine, one who works or studies excessively, the result of ~ing, the act of rotating the hips in an erotic manner, see: work