cock

\ \ [OE] The word cock is probably ultimately of onomatopoeic origin, imitative of the male fowl’s call (like the lengthier English cock-adoodle- doo [16], French coquerico, and German kikeriki). Beyond that it is difficult to go with any certainty; it reflects similar words in other languages, such as medieval Latin coccus and Old Norse kokkr, but which if any the English word was borrowed from is not clear. It has been suggested that it goes back to a Germanic base *kuk-, of which a variant was the source of chicken, but typical Old English spellings, such as kok and kokke, suggest that it may have been a foreign borrowing rather than a native Germanic word – perhaps pointing to Germanic coccus. The origin of the interconnected set of senses ‘spout, tap’, ‘hammer of a firearm’, and ‘penis’ is not known; it is possible that it represents an entirely different word, but the fact that German hahn ‘hen’ has the same meanings suggests otherwise.

\ \ Of derived words, cocker [19], as in ‘cocker spaniel’, comes from cocking, the sport of shooting woodcock, and cocky [18] is probably based on the notion of the cock as a spirited or swaggering bird, lording it over his hens (there may well be some connection with cock ‘penis’, too, for there is an isolated record of cocky meaning ‘lecherous’ in the 16th century). Cockerel [15] was originally a diminutive form.

\ \ Cf.⇒ CHICKEN, COCKY