efervescencia bedeutet auf Englisch

ebullience▼(quality of enthusiastic or lively expression of feelings and thoughts)
noun
[UK: ɪ.ˈbʌ.lɪəns] [US: ə.ˈbʊ.ljəns]

effervescence▼(the escape of gas from solution in a liquid)
noun
[UK: ˌe.fə.ˈvesns] [US: ˌe.fə.ˈvesns]