barnacle
/ˈbɑ:nəkl; `bɑrnəkl/ n
small shellfish that attaches itself to objects under water, eg rocks or the bottoms of ships 藤壶（附著於水下物体如岩石或船底的小甲壳动物）
(fig 比喻) He clung to his mother like a barnacle, ie followed her closely everywhere. 他形影不离地跟著母亲.