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Adjective: astounding  u'stawn-ding
  1. Bewildering or striking dumb with wonder
    "These sciences revealed not only the astounding largeness of the universe but also the dumbfounding smallness of human beings";
    - dumbfounding, dumfounding
  2. So surprisingly impressive as to stun or overwhelm
    "an astounding achievement";
    - astonishing, staggering, stupefying
Verb: astound  u'stawnd
  1. Fill with wonder or astonishment; greatly surprise
    "Your ability to speak six languages astounds me!";
    - amaze, astonish

See also: impressive, incredible, unbelievable

Type of: surprise

Encyclopedia: Astounding