From Proto-Italic *kaznos, from Proto-Indo-European *ḱeh₂s- (“bright grey”) (compare Welsh cannu (“to whiten”), ceinach (“hare”), English hare, Latin cascus (“old”), Ancient Greek ξανθός (xanthós, “yellow”), Old Prussian sasnis (“hare”), Pashto خړ (xëṛ, “grey”), Sanskrit शश (śaśa, “hare”)).
Practice speaking and memorizing "canus" and many other words and sentences in Latin.