exuberant

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.

adj

1. (of people) Very high-spirited; extremely energetic and enthusiastic.
   exuberant feeling
   He was a man of exuberant fancy, and, withal of an authority so irresistible that, at his will, he turned his varied fancies into facts. 1882, Frank R. Stockton, The Lady or the Tiger?
   She was a tall, earthy, exuberant girl with long hair and a pretty face. 1961, Joseph Heller, Catch-22
2. (literary, of things that grow) Abundant, luxuriant.
   exuberant foliage
   It pencilled each flower with rich and variegated hues, and threw over its exuberant foliage a vesture of emerald green. 1852, The Ark, and Odd Fellows' Western Magazine
   The County Architect's Department is starting to pleach trees to open up these vistas, now almost hidden by the exuberant growth. 1972, Ken Lemmon, "Restoration Work at Studley Royal," Garden History, vol. 1, no. 1, pp. 22