kloof \kloof\, noun:
(in South Africa) a deep glen; ravine.
There are the sheer kloofs cut in the hills by the rushing rains of centuries, down which the rivers sparkle...
-- H. Rider Haggard, "King Solomon's Mines," 1885
Take any poor Tommy, out at his picket on the bare hillside or rocky kloof, either blistering in 104-degree heat or shivering under his waterproof sheet, and he could easily believe it so.
-- Giles Foden, "Ladysmith," 1999
Kloof came to English in the 1700s from the Dutch word meaning "cleft."
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