If you tell someone something that is totally amazing or confusing, this is an example of astound.
Origin of astound; from Middle English astouned, astoned, past participle of astonien, astonish
transitive verba·stound·ed, a·stound·ing, a·stounds
Origin of astoundFrom Middle English astoned, past participle of astonen, to amaze; see astonish.
(third-person singular simple present astounds, present participle astounding, simple past and past participle astounded)
(comparative more astound, superlative most astound)
- (obsolete) Stunned; astounded; astonished.
From Middle English astouned, astoned, astuned, past participle of astounen, astonen, astunen (“to astonish”).