effervescence

American  

[ef-er-ves-uhns] / ˌɛf ərˈvɛs əns /

noun

effervescences plural

1. the quality or fact of being effervescent; bubbliness.

2. an instance of being effervescent; something effervescent.

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effervescence Scientific  

/ ĕf′ər-vĕs′əns /

1. The bubbling of a solution due to the escape of gas. The gas may form by a chemical reaction, as in a fermenting liquid, or by coming out of solution after having been under pressure, as in a carbonated drink.

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Explanation

Soda has effervescence. How can you tell? Just look for bubbles. Things that bubble have effervescence. Effervescence derives from French. To pronounce it correctly, say "eff er VES ence." Originally it meant "the action of boiling up," but it has also come to mean "lively," such as the effervescence of someone who has energy and charisma. It is the opposite of flatness, in which things seem slow, dead, or just "off," like all the air — or energy — is gone.

Example Sentences

“That is a cute little wild dog. … The effervescence there. I hope they eat a banana just like they always do.”

From Los Angeles Times • May 18, 2026

Those familiar with that Mike Leigh film are aware that Poppy’s level of effervescence can border on the uncomfortable.

From The Wall Street Journal • Sep. 30, 2025

"It just comes from, like, the most infectiously joyful, wild, dramatic place I was in in my life... and so that effervescence has come through on this record," she said.

From BBC • Aug. 27, 2025

Quan’s natural effervescence, however, gave his characters an energy and spirit that defied the expectation that these geeks had to be timid or socially awkward.

From Salon • Feb. 7, 2025

At the sight of him, my effervescence fades.

From "How It Went Down" by Kekla Magoon