HSK 7-9
憋
biē动形
to choke; to stifle; to restrain; to hold back
有意见别憋在心里不说。
Yǒu yì jiàn bié biē zài xīn lǐ bù shuō.
Do not hold your opinions in without speaking.
Say it
Hold the button, say it, then let go.
Also free:
Appears across levels (7-9) in the HSK 3.0 word list.