ENGLISH
REFERENCE

rumbustious

adj.
UK //ɹʌmbˈʌsʃəs// rum·bus·tious Informal
Synonyms
Origin

Uncertain but probably variation of robustious (“robust, large, noisy, violent”), from robust + -ious. Alternatively, from rum- (“nonsense syllable”) + bust + -ious.

© 2026 English Reference