The word "wavelet" is a transparent English compound formed by appending the diminutive suffix "-let" to the noun "wave." The core concept of "wave" originates from the Proto-Germanic wēbōną, related to moving to and fro, which evolved into the Old English verb 'wafian,' meaning to wave or fluctuate. The suffix "-let," of Old English origin, is a productive morpheme for creating nouns that signify a smaller scale or lesser degree, as seen in words like "booklet" or "droplet." Therefore, "wavelet" literally and logically means "a little wave," a meaning preserved in both its everyday use for a small ripple and its specialized technical use in mathematics and physics to describe a brief, localized wave oscillation.

Structure: wave (wave) + let (small/diminutive suffix) wave: From Old English 'wafian' (to wave with the hands). A Germanic root meaning a moving ridge or swell on the surface of water, or a similar undulating form or motion. let: A diminutive suffix from Old English '-lētan', used to form nouns denoting a smaller or lesser version of the root word.