dumbfoundment en · NOUN
Etymology
From dumbfound + -ment.
Meanings
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(uncountable) The fact of being dumbfounded or bewildered; astonishment.
At any rate, Elwes's reaction when he heard his own words was one of complete dumbfoundment. He stood 'stricken as if with a thunderbolt'.
1997, Lady Anne Somerset, Unnatural Murder: Poison at the Court of James I, London: Weidenfeld & Nicolson, →ISBN, page 282: