bedbug

The word 'bedbug' is a transparent compound formed from two native English words. 'Bed' originates from the Proto-Germanic badja-, meaning a sleeping place, which itself may derive from the Proto-Indo-European root bhedh- (to dig, implying a dug-out sleeping place). 'Bug' has a more obscure history, entering Middle English as a term for a frightening specter or hobgoblin, a sense which softened over time to refer generally to insects, particularly troublesome ones. The compound logically names the insect by its most notorious habitat, directly describing a 'bug' found in 'beds', where it emerges at night to feed on human blood.

Structure: bed + bug - bed: From Old English 'bedd' (a sleeping place, garden plot), of Germanic origin. Functions as a noun, specifying location. - bug: From Middle English 'bugge' (scarecrow, hobgoblin), later referring to an insect. Functions as a noun, specifying the type of creature.