Adjective: dumbfounding 'dúm,fawn-ding or dúm'fawn-ding [N. Amer], dúm'fawn-ding [Brit]
- Bewildering or striking dumb with wonder
"These sciences revealed not only the dumbfounding largeness of the universe but also the dumbfounding smallness of human beings";
- astounding, dumfounding
- Confuse or leave at a loss because of something complex or difficult to understand
"These questions dumbfound even the experts";
- confuse, throw, fox, befuddle, fuddle, bedevil, confound, discombobulate [informal], perplex, vex, stick, get, puzzle, mystify, baffle, beat, pose, bewilder, flummox, stupefy, nonplus, gravel
- Strike dumb; confuse with astonishment
"The magician's trick dumbfounded the audience";
- dumfound
See also: incredible, unbelievable