What does ebullient mean?
Ebullient describes someone who is cheerfully animated, overflowing with enthusiasm, and irrepressibly high-spirited. An ebullient host greets every guest with warmth and energy; an ebullient crowd erupts in celebration. The word carries a distinctly positive connotation, suggesting vitality so abundant it seems to spill outward — fittingly, since it derives from the Latin ebullire, meaning to boil up or bubble forth. Though its literal application to boiling liquids survives mainly in scientific contexts such as chemistry and geology, modern usage overwhelmingly favors the figurative sense applied to people and their behavior. It is somewhat formal or literary in register, lending a touch of vividness to descriptions of personality and mood. Useful synonyms include exuberant, buoyant, and effervescent, though none quite captures the image of joyful overflow that makes this word memorable.
Cheerful, energetic, and full of high spirits; bubbling over with enthusiasm.
"An ebullient young entrepreneur, she charmed investors with her infectious optimism."
Boiling or agitated as if boiling; characterized by the formation of bubbles.
"The geologist observed the ebullient spring venting steam along the fault line."
This literal sense is now rare, confined mostly to scientific and technical writing.
Ebullient literally means 'boiling out' — the same Latin root that gave us 'boil' and 'bouillon', so an ebullient person is essentially human soup at a rolling boil.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of ebullient
Ebullient comes from the Latin verb ebullire, meaning "to boil up" or "to bubble out," formed from the prefix e- (out) and bullire (to boil), itself derived from bulla, meaning "bubble." The word entered English in the late 16th or early 17th century, initially carrying its literal sense of boiling liquids before the figurative sense of bubbling-over enthusiasm became dominant. It shares its root with related forms including the noun ebullition and, more distantly, English words like boil, bouillon, and bubble.
Word family
Usage notes
Most often used of people or their moods, manner, or personalities, with a strongly positive connotation. The literal sense relating to actual boiling liquids is rare today, appearing mainly in scientific writing.
Don't confuse with
"Effluent" means liquid waste or sewage flowing out, while "ebullient" describes a person's cheerful exuberance.