HSK 7-9
苦心
kǔxīn名副
painstaking effort; to take a lot of trouble; laborious at pains
孩子终于明白父母的苦心。
Háizi zhōngyú míngbai fùmǔ de kǔxīn.
The child finally understood the care and effort his parents had put in.
Say it
Hold the button, say it, then let go.
Other HSK words sharing a character
Also free:
Appears across levels (7-9) in the HSK 3.0 word list.