silkworm

The word 'silkworm' is a transparent Old English compound, directly combining 'seolc' (silk) and 'wyrm' (worm, larva). This Germanic compounding logic creates a highly descriptive term for the creature based on its most notable product and its biological stage. While 'wyrm' had broader meanings including dragon or serpent, its application to legless larvae was established in Old English. The term has remained perfectly stable in meaning for over a millennium, precisely naming the silk-producing caterpillar of the moth Bombyx mori, with its first element tracing back via ancient trade routes to terms for the Chinese people who first cultivated it.

Structure: silk (material) + worm (larva) silk: From Old English 'seolc', 'sioloc', ultimately from an Asian source (e.g., Greek 'sērikón', relating to the Seres, an Eastern people). It functions as a noun modifier specifying the type of material produced. worm: From Old English 'wyrm', meaning 'serpent, dragon, insect, larva'. It functions as the head noun, indicating the creature is a larva or creeping insect.