The quality of being cheerful and full of energy; exuberant enthusiasm or excitement. A bubbling over of high spirits or vivacity.
From Latin 'ebullire,' meaning 'to boil over,' from 'e-' (out) + 'bullire' (to bubble). The metaphor compares intense excitement to liquid boiling over the rim of a container.
Think of a pot of water that's so excited it's literally bubbling over - that's ebullience! Your enthusiasm is so intense it can't be contained, just like boiling water that bubbles up and spills over the edges.
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