boggler

/ˈbɑɡlər/
noun
  1. Something that causes astonishment, confusion, or difficulty to understand.
    • The final exam was a real boggler for most of the students.
    • The magician's trick was a boggler that left the audience speechless.
    • This puzzle is a boggler; I've been trying to solve it for hours.
  2. A person who hesitates or is easily overwhelmed by challenges.
    • The coach told the team not to be boggler and to face the competition head-on.
    • He's a boggler when it comes to making big decisions.
    • Don't be a boggler; just jump in and try something new.
Synonyms
What does "boggler" mean? | whatsthatwordmean | whatsthatwordmean