The term 'suck' can be defined as to DRAW something in with a sucking motion, or to take something in through the mouth. In this crossword, three words that relate to this definition are given: IMBIBE (6 letters), DRAW (4 letters), and DRINK (5 letters). IMBIBE means to consume alcohol, DRAW means to pull something in, and DRINK means to take liquid into the mouth. All three words can be used to describe the act of sucking something in.