fetid

The word 'fetid' has a direct and pungent lineage from the Latin verb fetēre, which meant 'to stink'. The adjectival suffix '-id' was attached to the root to form the Latin fetidus, meaning 'stinking'. This term passed into Middle English as 'fetide' from Old French, retaining its core olfactory sense. The logic is transparent: the morpheme 'fet' carries the literal meaning of a foul odor, and the suffix '-id' simply denotes the possession of that quality, resulting in the modern adjective describing something that smells offensive.

Structure: fet (stink) + id (adjective suffix) fet (from Latin fetēre, meaning 'to stink'); id (a Latin-derived adjectival suffix meaning 'having the quality of').