boggle
verb
[ ˈbɒɡ(ə)l ]
• (of a person or their mind) be astonished or baffled when trying to imagine something.
• "the mind boggles at the spectacle"
Similar:
marvel,
wonder,
be astonished,
be astounded,
be amazed,
be filled with amazement,
be overwhelmed,
be shocked,
be staggered,
be bowled over,
be startled,
gape,
goggle,
gawk,
be flabbergasted,
Origin:
late 16th century: probably of dialect origin and related to bogle and bogey2.