cocky

The adjective 'cocky' is a straightforward formation from the noun 'cock,' referring to a rooster. The metaphorical connection lies in the stereotypical behavior of a rooster, which struts with a proud, assertive, and often combative demeanor. By adding the adjectival suffix '-y,' the word came to mean "characterized by such rooster-like pride," evolving in modern usage to describe an arrogant and overconfident attitude in a person. Its journey is purely within English, drawing on a familiar animal metaphor to create a vivid human descriptor.

Structure: cock (rooster) + y (adjective-forming suffix) - cock: From Old English cocc (rooster, male bird), of imitative origin. In the word, it functions as the root, conveying the metaphorical sense of a strutting, proud male bird. - y: A native English suffix (from Old English -ig) used to form adjectives meaning "characterized by" or "full of."