Meaning

noun a sweater or jersey with a high close-fitting collar

noun any of various aquatic and land reptiles having a bony shell and flipper-like limbs for swimming

verb overturn accidentally

originModification of Middle English tortou, tortu, from Old French tortüe (under the influence of Middle English turtel, turtur (“turtledove”), see Etymology 2 below), from Medieval Latin tortuca (compare Spanish tortuga), the same source of tortoise (see there for more). Displaced native Old English byrdling (See birdling).

Etymology from Wiktionary, CC BY-SA 3.0