puzzle puzzle /ˈpʌzəl/

noun

1. A game that tests your ingenuity  ( puzzle )
   a game that tests your ingenuity
    She spent her evening engrossed in a challenging jigsaw puzzle.
   She spent her evening engrossed in a challenging jigsaw puzzle.
   
   
2. A particularly baffling problem that is said to have a correct solution  ( mystifier , puzzle , puzzler , teaser , riddler )
   a particularly baffling problem that is said to have a correct solution
    He loved to solve chessmate puzzles
   he loved to solve chessmate puzzles
    That's a real puzzler
   that's a real puzzler
   

verb

1. () Be a mystery or bewildering to  ( beat , dumbfound , flummox , get , gravel , nonplus , perplex , pose , stick , amaze , baffle , bewilder , mystify , puzzle , stupefy , vex )
   be a mystery or bewildering to
    This beats me!
   This beats me!
    Got me--I don't know the answer!
   Got me--I don't know the answer!
    A vexing problem
   a vexing problem
    This question really stuck me
   This question really stuck me
   
2. Be uncertain about; think about without fully understanding or being able to decide  ( puzzle )
   be uncertain about; think about without fully understanding or being able to decide
    We puzzled over her sudden departure
   We puzzled over her sudden departure