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ebullient

/ɪˈbʊliənt/ adjective

Latin root: ēbulliēns Wiktionary

Origin

Borrowing from Latin ēbulliēns, present participle of ēbulliō (“to boil”), from bulliō (“to bubble up”) (English boil). Compare bubbling, bubbly, and perky, which use a similar metaphor.

From Wiktionary, via Kaikki.org (CC BY-SA)