puffed-up

the adjective 'puffed-up' is a vivid metaphorical extension of the literal act of puffing air into something, such as a balloon or one's chest, to make it swell and appear larger. the core verb 'puff', imitative of a short explosive breath, evolved to describe the act of blowing or inflating. by the 16th century, the phrasal form 'puff up' was used figuratively to describe making someone swell with pride or self-importance. the hyphenated participial form 'puffed-up' subsequently crystallized as a fixed descriptor for an inflated and overly proud demeanor, directly linking the physical image of expansion to the abstract concept of vanity.

this is a compound adjective formed from the past participle 'puffed' and the particle 'up'. 'puffed' originates from middle english 'puffen', of imitative origin, representing the sound of a short burst of air. 'up' is from old english 'ūp', of germanic origin.