Bufo

n.

toad genus, from Latin bufo "a toad," an Osco-Umbrian loan-word, perhaps from PIE *gwebh-, a root denoting sliminess and also forming words for "frog" (cf. Old Prussian gabawo "toad," Old Church Slavonic žaba "frog," Middle Low German kwappe "tadpole," German Quappe).

Online Etymology Dictionary, © 2010 Douglas Harper

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