The act of reducing to powder, or of sharpening, by
friction.

Any severe continuous work or occupation; esp., hard and
uninteresting study.

To become ground or pulverized by friction; as, this corn
grinds well.

To perform hard aud distasteful service; to drudge; to
study hard, as for an examination.

To become polished or sharpened by friction; as, glass
grinds smooth; steel grinds to a sharp edge.

To study hard for examination.

To wear down, polish, or sharpen, by friction; to make
smooth, sharp, or pointed; to whet, as a knife or drill; to rub against
one another, as teeth, etc.

To reduce to powder by friction, as in a mill, or with
the teeth; to crush into small fragments; to produce as by the action
of millstones.

To oppress by severe exactions; to harass.

To move with much difficulty or friction; to grate.