HSK 4
免费
miǎnfèi动
free (of charge)
这个公园今天可以免费进入。
Zhè ge gōng yuán jīn tiān kě yǐ miǎn fèi jìn rù.
This park can be entered free of charge today.
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.