Dumbfounder

noun, verb

noun, verb ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Someone who or that which dumbfounds.
Verb
  1. 1
    To dumbfound. transitive

Synonyms

All synonyms
amazeastonishastoundawebedazzlebewilder

Etymology

Etymology 1

Alteration of dumbfound.

Etymology 2

From dumbfound + -er.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.