dumbstricken

/ˈdʌmˌstrɪkən/
adjective
  1. Extremely shocked or surprised, so that you cannot speak; dumbstruck.
    • She was dumbstricken when she saw the surprise party her friends had arranged.
    • He stood dumbstricken, unable to process the news of his promotion.
    • The audience sat dumbstricken after the magician's final trick.
Antonyms