The word 'timbre' entered English in the mid-19th century from French, where it originally referred to a bell or the sound of a bell. The French term itself evolved from the Greek word 'tumpanon,' meaning "drum," via the Vulgar Latin 'timbrium.' This etymological journey from a specific percussion instrument to a general term for tonal quality illustrates a classic semantic shift. The logic connects the characteristic, resonant sound of a struck object to the distinctive character of any musical sound, abstracting the concept from a specific source to a universal acoustic property.

The word is a loanword from French, adopted as a single, unanalyzable unit in English. Its components within French (timbre, originally meaning "drum" or "bell") are not active morphemes in the English word.