HSK 4
不够
búgòu动副
not enough; insufficient; inadequate
这些材料还不够用。
Zhè xiē cái liào hái bú gòu yòng.
These materials are still not enough.
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 4.