exuberant

Meanings

1. Very cheery and peppy; extremely cheerful, energetic and enthusiastic.
2. Abundant, luxuriant.
3. Unusually proliferative, widespread or extreme, particularly in relation to a disease, immune reaction, or tissue

Etymology

From Middle French exubérant, from Latin exūberāns, the present active participle of exūberō (“be abundant”). Put together from ex (“out”), and uber (“udder”), and originally would have referred to a cow or she-goat which was making so much milk that it naturally dripped or sprayed from the udder.