carse

The story

1. Middle English · inherited fromkerrs, cars
2. English todaycarse

From Middle English kerrs, cars, of uncertain origin. Perhaps Celtic: the term is "first found in a semi-Gaelic form", Carsach (c. 1143); compare Welsh cars (“bog, fen”), carsen (“reed”), Armoric kars, korsen (“bog plant, reed”). Alternatively, perhaps related to carr (“bog, march, swampland”) (perhaps suffixed with a variant of -ish, -sæ); compare Swedish kärr (“fen; bog”).