To make into powder by friction.

磨为粉末；研；碾。

To sharpen or smooth by friction.

磨快；磨光。

To grate or rub together, as the teeth.

磨擦(牙齿)；切齿。

To oppress; harass.

压迫；欺压；折磨。

To turn the crank of, as a hand organ or the like.

旋转曲柄(如手摇风琴及类似物之柄)。

To become sharpened or polished, or to be made into power, by friction.

磨；碾；磨快。

To be grated or rubbed together.

相磨作响；相擦。

To study hard.

【俚】苦读用功。

The act of sharpening, polishing, or making into powder.

磨快；磨光；磨作粉末。

A grating or rubbing together.

磨擦；相磨。

The turning of a crank.

回转曲柄。

Hard study, as for an examination; laborious and tedious work.

苦读；用功(如为预备考试)；辛苦冗长之工作。

A student who studies laboriously.

【俚】刻苦用功之学生。