HSK 6
密
mì形
dense; close; thick; intimate; close; (bound form) secret; confidential; (Internet slang) to send a private message to (sb); to DM; surname Mi; name of an ancient state
树林太密阳光照不进来。
Shù lín tài mì yáng guāng zhào bú jìn lái.
The woods are so dense that sunlight cannot get through.
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.