IPA: /ˈʃɪpˌwɜːrm/
KK: /ʃɪpˌwɜrm/
A type of marine mollusk that looks like a worm and bores into wood, especially underwater wood like that of ships, causing damage.
The shipworm can weaken the structure of a dock by burrowing into the wooden supports.
Shipworm is formed from "ship" (from Old English *scip*, meaning a vessel for travel on water) and "worm" (from Old English *wyrm*, meaning a serpent or creature). The word refers to a marine bivalve mollusk that bores into wood, particularly ships, resembling a worm in its destructive behavior.
Think of a 'ship' as a vessel that travels on water and a 'worm' as a creature that bores into things. This helps you remember that a shipworm is a creature that bores into ships.