HSK 3
难题
nántí名
difficult problem
这个难题我们还没解决。
Zhè ge nán tí wǒ men hái méi jiě jué.
We have not solved this difficult problem yet.
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 3.