Puzzle
Part of speech: verb
Definition: To perplex (someone).
Part of speech: noun
Definition: Anything that is difficult to understand or make sense of. A game for one person that is more or less difficult to work out or complete. A crossword puzzle. A jigsaw puzzle. A riddle.
Example sentence: Innovation is like looking for pieces in a jigsaw puzzle. You have to find a lot of pieces that don't match to find the one or two pieces that match.
Stupefy
Part of speech: verb
Definition: To dull the senses or capacity to think thereby reducing responsiveness; to dazzle.