It is the icelandic 'skrida.
"Climbing in The British Isles. Vol. 1 - England"
W. P. Haskett Smith
In icelandic, 'gafl' is said to mean 'the end of a house or of a ship.
"Climbing in The British Isles. Vol. 1 - England"
W. P. Haskett Smith
Dr. Murray tells us that the word has no connection with the icelandic 'klofi,' yet assigns to the latter word the origin of 'cloof,' in the sense of the fork of a tree, or of the human body.
"Climbing in The British Isles. Vol. 1 - England"
W. P. Haskett Smith