Correct
磨穿铁砚
/ mó chuān tiě yàn /
Strokes
Definition
to grind one's way through an ink stone/to persevere in a difficult task (idiom)/to study diligently (idiom)
Example
Definition
wear out an iron inkstone―study long and assiduously
1
Fāyáng
发扬
mó
磨
chuān
穿
tiěyàn
铁砚
de
的
jīngshén
精神
display a persevering spirit