effusive (adj.) Look up effusive at Dictionary.com
"flowing profusely" (especially of words), 1660s, with -ive + Latin effus-, stem of effundere "pour forth, spread abroad; to lavish, squander, waste," from assimilated form of ex "out" (see ex-) + fundere "pour" (see found (v.2)). Hence, "with extravagant display of feelings" (1863). Related: Effusively.