IPA: /ˈbreɪnˌtiːzər/
KK: /ˈbrānˌtēzər/
A type of puzzle or problem that requires thought and cleverness to solve.
I love solving a good brainteaser during my free time.
Brainteaser is formed from "brain" (from Old English "brægen", meaning the organ of thought) and "teaser" (from the verb "tease", meaning to provoke or annoy). The word describes a puzzle or problem that provokes thought and challenges the mind.
Think of using your 'brain' to solve a 'teaser' or puzzle — that's what a brainteaser is all about.
No commonly confused words.