HSK 1
都
dōu副
all; both; entirely; (used for emphasis) even; already; (not) at all; surname Du
我们都在学校学习。
Wǒmen dōu zài xuéxiào xuéxí.
We all study at school.
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 1.