HSK 1
口
kǒu名量
mouth; classifier for things with mouths (people, domestic animals, cannons, wells etc); classifier for bites or mouthfuls
我早上喝了一口热茶。
Wǒ zǎoshang hē le yì kǒu rè chá.
I took a sip of hot tea in the morning.
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.