The word 'whirr' belongs to the category of onomatopoeia, where the form of the word is a direct imitation of the sound it represents. It emerged in Middle English, likely influenced by Scandinavian languages, and is related to similar imitative words like 'whir' and 'whiz'. The core logic of its formation is purely phonetic, capturing the vibrant, rapid, and continuous sound of mechanical motion, such as that made by spinning wheels, machinery, or bird wings. Its spelling has stabilized over time to emphasize the prolonged, vibrating nature of the sound with the double 'r'.

This is an onomatopoeic word, formed to imitate the sound it describes. Its origin is likely Scandinavian, related to the Old Norse word hvīna meaning "to whiz."