The Collaborative International Dictionary
dumfounding
dumfounding \dumfounding\ adj. same as dumbfounding.
Syn: astonishing, astounding, dumbfounding.
Wiktionary
dumfounding
alt. (present participle of dumfound English) vb. (present participle of dumfound English)
WordNet
dumfounding
adj. bewildering or striking dumb with wonder [syn: astounding, dumbfounding]