suck ·verb
Definition: to have something in your mouth and use your tongue, lips, etc. to pull on it or to get liquid, air, etc. out of it Level: C2
孩子等待时安静地吮吸着棒棒糖。
The child was quietly ___sucking a lollipop while waiting.
有些人无意识地吮吸拇指，这是从小养成的习惯。
Some people unconsciously ___suck their thumbs as a habit from childhood.
他笑着说，他在日记本页面上下了毒，这样任何用手指翻页并吮吸手指的人都会死。
He laughed and said he poisoned the diary pages so that anyone who ___sucks their fingers to turn them would die.