Canine comes from Latin canīnus ('of a dog'), from canis ('dog'), cognate with Greek kuōn and English hound, all from Proto-Indo-European *kwon-. The historical trail runs through canīnus in Latin, canis in Latin, and *ḱwṓ in Proto-Indo-European. Used as an adjective and noun, canine now means "of or like dogs; a pointed tooth between the incisors and premolars", so the present definition can be read against the older forms and meanings. The same lexical family is also visible in related forms such as canid. The result is a borrowed or transmitted form whose modern spelling carries a compact record of its route into English.