neck-and-neck

The idiom "neck and neck" emerged from horse racing in the early 19th century. It vividly describes a situation where two horses are so close in a race that their necks are aligned, with neither able to gain a clear advantage. The repetition of "neck" emphasizes the precise, side-by-side positioning. From this literal sporting image, the term evolved into a standard metaphor for any close competition where participants are evenly matched and vying for the lead.

This is a fixed compound idiom derived from the repetition of the English word "neck". The word "neck" originates from Old English hnecca, meaning "the nape or back of the neck", from Proto-Germanic hnekk-.