puzzle
UK[ˈpʌz(ə)l]US[ˈpʌz(ə)l]
v
to cause someone to feel confused because they cannot understand or make sense of something
n
a game, toy, or problem designed to test knowledge or ingenuity
Etymology
The origin of the word 'puzzle' is somewhat obscure, first appearing in English in the late 16th century. It is likely derived from a frequentative form of the now-obsolete verb 'pose' (to perplex or put in a difficult position), influenced by the verb 'oppose'. The core idea was one of creating a state of mental bewilderment or confusion. From this initial sense of causing perplexity, the meaning evolved by the early 18th century to specifically denote a contrived problem or game designed to challenge the mind, giving us the modern sense of a jigsaw or logic puzzle.
Analysis
The word 'puzzle' is a simplex word of uncertain origin, likely a frequentative verb formation. Its functional role is as a complete lexical unit.
Examples
The detective was puzzled by the lack of evidence at the crime scene.
She spent the afternoon working on a 1000-piece jigsaw puzzle.
The sudden change in his behavior is a real puzzle to his friends.