verb (used without object), ef·fer·vesced, ef·fer·vesc·ing.

  1. to give off bubbles of gas, as fermenting liquors.
  2. to issue forth in bubbles.
  3. to show enthusiasm, excitement, liveliness, etc.: The parents effervesced with pride over their new baby.

verb (intr)

  1. (of a liquid) to give off bubbles of gas
  2. (of a gas) to issue in bubbles from a liquid
  3. to exhibit great excitement, vivacity, etc

1650s, “the action of boiling up,” from French effervescence (1640s), from Latin effervescentem, present participle of effervescere “to boil up, boil over,” from ex- “out” (see ex-) + fervescere “begin to boil,” from fervere “be hot, boil” (see brew). Figurative sense of “liveliness” is from 1748. Related: Effervescency.


1702, from Latin effervescere (see effervescence). Related: Effervesced; effervescing.

  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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