casse-tête
Meanings
Noun
1. brainteaser, puzzle
2. headache, problem (by extension)
3. warclub
4. jigsaw puzzle (North America)
Examples6
It's a brain-teaser.
No one could solve the puzzle.
No one could solve the puzzle.
I can't figure out how to solve the puzzle.
It's a hassle trying to decide what to wear to the party.
Conjugating reflexive verbs is a real mind-boggler.