A fell (from Old Norse fell, fjall, "mountain") is a high and barren landscape feature, such as a mountain or moor-covered hill. The term is most often employed in Fennoscandia, Iceland, the Isle of Man, parts of northern England, and Scotland. Etymology. The English word "fell" comes from Old Norse fell and fjall (both forms existed). It is cognate with Danish fjeld, Faroese fjall and fjøll, Icelandic fjall and fell, Norwegian fjell with dialects fjøll, fjødd, fjedd, fjedl, fjill, fil(l), and fel, and Swedish fjäll, all referring to mountains rising above the alpine tree line.
https://en.wikipedia.org/wiki/Fell