Related Clues:

• Most respectful (of)
• Rapt in reverence
• Transfixed
• In a state of reverence
• Struck speechless
• Floored
• Left open-mouthed
• Stupefied
• Slack-jawed
• Dumbstruck
• Cowed
• Impressed mightily
• Knocked for a loop
• Knocked the socks off of
• Impressed, and how!