The quality of being bubbly or foamy; the process of bubbling as gas escapes.

Liveliness or enthusiasm.

जीवंतता या उत्साह।

English Usage: The effervescence of the crowd was contagious during the festival.

Hindi Usage: महोत्सव के दौरान भीड़ की उत्साहजनकता संक्रामक थी।