One of the mysteries of the English language finally explained.
Characterized by noisy roughness; wild, turbulent.
Early 19th century; earliest use found in Prompter. Either from rowdy-dow, with addition of an arbitrary final syllable to produce a rhyming form, or a reduplication (with variation of the initial consonant) of rowdy.
rowdy dowdy/ˌraʊdɪ ˈdaʊdi/
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