tusk

From Middle English tusk (also tux, tusch), from Old English tūsc, tūx (“canine tooth, tusk, molar”), from Proto-West Germanic *tų̄sk, *tunsk, from Proto-Germanic *tunþskaz (“canine tooth”), extended form of *tanþs (“tooth”), from Proto-Indo-European *h₃dónts (“tooth”). Cognate with Saterland Frisian Tusk (“tooth”), West Frisian tosk (“tooth”), Icelandic toskur (“a tusk, tooth”) (whence the Old Norse and Icelandic Ratatoskr and Ratatoskur respectively), Gothic 𐍄𐌿𐌽𐌸𐌿𐍃 (tunþus, “tooth”) and *𐍄𐌿𐌽𐌳𐌹 (*tundi, “thorn, tooth”). Doublet of tush. More at tooth.

出典: Wiktionary「tusk」（CC BY-SA 4.0）