What is "tighvein"

Tighvein is a hill above Lamlash on the Isle of Arran in western Scotland. It is a Marilyn (a hill with topographic prominence of at least 150m) and the highest point on the south-eastern section of the island, south-east of the pass of Monambre Glen. Two miles from the nearest road, the top is a heathery, boggy moor, almost entirely ringed by thick forestry plantations. For this reason it is rarely climbed; there are no paths to the top.