Rarely known; unusual; strange.
First Known Use: before 12th century
From Middle English, from Old English seldcuth, from seldan = seldom + cuth =known, from cunnan = to know) Uncouth has a obsolete usage similar to selcouth.
‘A selcouth novelty,’ muttered the knight, ‘to advance to storm such a castle without pennon or banner displayed.’
1814, Walter Scott, Ivanhoe