1. to be amazed or overwhelmed by something difficult to understand or believe
Usage: often used with ‘at’ or ‘the mind’
2. to hesitate or be reluctant because of doubt or fear
Usage: often used with ‘at’

Examples

• The complexity of quantum physics boggles my mind.
• It boggles me how quickly technology changes.
• The sheer size of the universe boggles most people.
• She boggled at the thought of speaking in public.
• The cost of college tuition boggles many families.
• His mathematical abilities boggle his teachers.
• They boggled at the dangerous mountain climb.