Correct

吸吮

/ xīshǔn / 
Strokes

Definition

to suck on (sth)/to suck in

Example

As a Verb

suck; absorb

1
Xīshǔn
吸吮
rǔtóu
乳头

suck at/on the nipple

2
Xīshǔn
吸吮
mǔzhǐ
拇指

suck the thumb

3
Xīshǔn
吸吮
mǔrǔ
母乳

nurse at the mother's breast

4
Xīshǔn
吸吮
júzhī
橘汁

give the orange a suck