磨

On the HSK 6 vocabulary list, at CEFR level C2.

mó ㄇㄛˊ

- to rub
- to grind
- to polish
- to sharpen
- to wear down
- to die out
- to waste time
- to pester
- to insist

mò ㄇㄛˋ

- grindstone
- to grind
- to turn round

Sources