puzzle

US /ˈpʌz.əl/
UK /ˈpʌz.əl/
"puzzle" picture
1.

a game, toy, or problem designed to test ingenuity or knowledge.

:
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She spent hours trying to solve the jigsaw puzzle.
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The crossword puzzle in the newspaper was very challenging.
:
riddleenigmaconundrummysteryproblem
2.

a person or thing that is difficult to understand or explain.

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His sudden disappearance remains a complete puzzle.
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The human mind is a complex puzzle.
:
mysteryenigmaconundrumriddleproblem
1.

to confuse or bewilder (someone).

:
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The strange message puzzled him.
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Her sudden change of plans puzzled everyone.
:
baffleperplexbewilderconfusemystify
:
jigsaw puzzle