exuberant Look up exuberant at Dictionary.com
mid-15c., from L. exuberantem "overabundance," prp. of exuberare "be abundant, grow luxuriously," from ex- "thoroughly" + uberare "be fruitful," related to uber "udder," from PIE base *udhr- (see udder). Related: Exuberantly; exuberate; exuberating.