the.com/effervescence

means The bubbling, fizzing release of gas from a liquid — or, figuratively, a bright and lively enthusiasm that seems to sparkle up out of someone.

from From Latin effervescere, 'to boil up' or 'to boil over' — a combination of ex- ('out, thoroughly') and fervescere ('to begin to boil'), itself from fervere ('to boil, to glow with heat'), the same root that gives English 'fervent' and 'fervor'. So the word's deep ancestry is heat and boiling, not bubbles specifically — the fizz sense is a later, cooler borrowing of a hot metaphor.