The word 'waggle' is a classic example of expressive word formation in English, built upon the simpler verb 'wag'. The core 'wag' itself likely originates from Middle English 'waggen', a word thought to be of imitative or expressive origin, capturing the motion it describes. The addition of the frequentative suffix '-le' transforms it into 'waggle', specifically denoting a rapid, repeated, or oscillating version of that motion. This pattern is common in English, creating vivid verbs like 'wriggle' from 'wig' and 'sparkle' from an old root related to 'spark'. Thus, 'waggle' evolved not from classical roots but from a native, sound-symbolic base enhanced by a grammatical suffix to refine its descriptive precision.

This word is a simplex, formed by the frequentative or iterative suffix '-le' added to the base 'wag'. The base 'wag' is of Middle English origin, likely imitative in nature. The suffix '-le' (from Old English '-lian') indicates repeated or small actions.