An Etymological Dictionary of the German Language, K (1891)
by Friedrich Kluge, translated by John Francis Davis
Karst
Friedrich Kluge2507442An Etymological Dictionary of the German Language, K — Karst1891John Francis Davis

Karst, m., ‘hoe,’ from the equiv. MidHG. karst, m., OHG. and OSax. carst; the word is not found in other groups. The etymology is dubious; allied to kehren (karjan), ‘to sweep’?.