Definitions

1. 1. If you work at it hard enough, you can grind an iron bar into a needle.
2. 2. 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
3. 3. to study diligently

Components

• 只要 zhǐ yào – if only
• 功夫 gōng fu – skill
• 深 shēn – deep
• 铁杵 tiě chǔ – iron pestle
• 磨 mó – to rub
• 成 Chéng – surname Cheng
• 针 zhēn – needle