/ ˌefəˈvesnt; NAmE ˌefərˈv-/ adjective
1.
( approving ) ( of people and their behaviour ) excited, enthusiastic and full of energy
SYN bubbly
2.
( of a liquid ) having or producing small bubbles of gas
SYN fizzy
► ef·fer·ves·cence / ˌefəˈvesns; NAmE ˌefərˈv-/ noun [ U ]
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WORD ORIGIN
late 17th cent.: from Latin effervescent- boiling up, from the verb effervescere , from ex- out, up + fervescere begin to boil.