chesty

The word "chesty" is a straightforward English compound formed from the noun "chest" and the adjectival suffix "-y." The primary anatomical sense, "having a large chest," emerged naturally from the physical descriptor. The figurative, informal meaning of being boastful or arrogantly confident developed later, drawing a metaphorical link between a puffed-out, expanded chest and a posture of pride or self-assertion. This evolution from a literal physical attribute to a metaphorical character trait follows a common pattern in English where bodily features inspire descriptions of behavior.

Structure: chest (body part) + y (adjective suffix) - chest: From Old English cest, cist (box, coffer, chest), from Proto-Germanic kistō, from Latin cista (box, chest), from Ancient Greek κίστη (kístē, box). In this word, it refers to the part of the body. - y: A native English suffix meaning "characterized by; full of; having the quality of," from Old English -ig.