/ˈsʌkə(r) ||; ˈsʌkɚ/noun[C] 1 (informal 非正式) a person who believes everything that you tell him/her and who is easy to trick or persuade to do sth 容易受骗的人
2 a part of some plants, animals or insects that is used for helping them stick onto a surface （动物的）吸盘；（植物的）根出条，吸根