showing unyielding diligence in one's studies; wearing a hole through one's metal inkstone from constant studying

Kyūjitai form of 磨穿鉄硯 (“showing unyielding diligence in one's studies”)

every day; daily

everyday life; daily life

inkstone

studying, studies, study

to study / to discount, to reduce the price of something

Alternative form of 勉強

put on (to the feet) / dig / pierce / drill

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend