To be in a state of natural ebullition; to bubble and hiss, as fermenting liquors, or any fluid, when some part escapes in a gaseous form.

(ef-fer-vesce) The bubbling produced when carbon dioxide (CO2)is liberated by the reaction of dilute HCl (hydrochloric acid) and calcite (CaCO3) and powdered dolomite (CaMg(CO3)2) or other carbonate minerals.

form bubbles; "The boiling soup was frothing"; "The river was foaming"; "Sparkling water"

To exhibit, in lively natural expression, feelings that can not be repressed or concealed; as, to effervesce with joy or merriment.