Puzzle

desafio

(game or toy, or problem, requiring some effort to complete or work out, which is intended as a pastime and/or to test one’s mental ability)

enigma

(thing which is difficult to make sense of or understand)

quebra-cabeça

(game or toy, or problem, requiring some effort to complete or work out, which is intended as a pastime and/or to test one’s mental ability)

confundir

((transitive) to cause (oneself, or someone or their mind, etc.) to feel confused or mystified because they cannot understand a complicated matter, a problem, etc.)

desconcertar

((transitive) to cause (oneself, or someone or their mind, etc.) to feel confused or mystified because they cannot understand a complicated matter, a problem, etc.)

intrigar

((transitive) to cause (oneself, or someone or their mind, etc.) to feel confused or mystified because they cannot understand a complicated matter, a problem, etc.)