HSK 6
下功夫
xià gōngfuto put in time and energy; to concentrate one's efforts; variant of 下工夫
想提高听力就得多下功夫。
Xiǎng tí gāo tīng lì jiù děi duō xià gōng fu.
Improving listening takes considerable effort.
Say it
Hold the button, say it, then let go.
Other HSK words sharing a character
Also free:
New in the HSK 3.0 word list at level 6.