1. As if struck dumb with astonishment and surprise
   - dumbfounded, dumfounded, flabbergasted, stupefied, thunderstruck, dumbstricken

See also: surprised

• Iditarod Trail Dog Sled Race
• idle
• idle pulley
• idle talk
• idle wheel
• idle words
• idleness
• idler
• idler pulley
• idling
• idly
• Ido
• idocrase
• idol
• idol worship
• idol worshiper
• idolater
• idolatress
• idolatrous
• idolatrously
• idolatry
• idolisation
• idolise
• idolised
• idoliser