To surprise someone greatly or fill them with wonder and astonishment.
From Old English 'amasian,' possibly with roots in 'maze.' The original sense was 'to stupefy or confuse,' and it evolved to mean 'to astound or surprise greatly.'
The word used to mean 'to confuse or stupefy,' which makes sense—amazing things DO stupefy you temporarily because your brain is processing something unexpected. That's why we go silent for a second when something amazing happens!
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