Chinese Dictionary

Usage of the character 杵

pestle
to poke

vajra scepter (ritual object of Buddhism)

móchǔchéngzhēn

to grind an iron bar down to a fine needle (idiom); fig. to persevere in a difficult task
to study diligently

xuèliúpiāochǔ

enough blood flowing to float pestles (idiom); rivers of blood
blood bath

tiěchǔchéngzhēn

see 磨杵成針／磨杵成针 (móchǔchéngzhēn)

zhǐyàogōngfushēn,tiěchǔmóchéngzhēn

只要功夫深，铁杵磨成针

[只要功夫深，鐵杵磨成針]

If you work at it hard enough, you can grind an iron bar into a needle.
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
to study diligently