C14: of uncertain origin; perhaps from a plural form of carr
carse in American English
(kɑːrs, kers)
noun
Scot
bottom land
Word origin
[1325–75; ME cars, kerss, equiv. to ker marsh (‹ ON kjarr marshy grove; cf. Sw kärr marsh) + -ss, north var. of -ish1]This word is first recorded in the period 1325–75. Other words that entered Englishat around the same time include: center, paper, reduce, report, wave