磨

磨盘

mò pán

lower millstone

琢磨

zhuó mó

to carve and polish (jade)

琢磨

zuó mo

to ponder

磨蹭

mó ceng

to rub lightly

酷刑折磨

kù xíng zhé mó

torture and cruel treatment

电磨

diàn mò

electric mill (for grinding wheat etc)

不可磨灭

bù kě mó miè

indelible

刀不磨要生锈，人不学要落后

dāo bù mó yào shēng xiù , rén bù xué yào luò hòu

(proverb) a blade will get rusty if it is not sharpened; a man will fall behind if he doesn't study

切磋琢磨

qiē cuō zhuó mó

lit. cutting and polishing (idiom)

卸磨杀驴

xiè mò shā lǘ

lit. to kill the donkey when the grinding is done (idiom)

反酷刑折磨公约

fǎn kù xíng zhé mó gōng yuē

UN convention against torture and cruel treatment (ratified by PRC in 1988)

只要功夫深，铁杵磨成针

zhǐ yào gōng fu shēn , tiě chǔ mó chéng zhēn

cf idiom 磨杵成針|磨杵成针, to grind an iron bar down to a fine needle (idiom); fig. to persevere in a difficult task