selcouth

The story

1. Old English · inherited fromselcūþ
2. Middle English · inherited fromselcouth
3. English todayselcouth

From Middle English selcouth, from Old English selcūþ, seldcūþ (“unusual, unwonted, little known, unfamiliar, novel, rare”), from seld- (“rarely”) + cūþ (“known”); equivalent to seld + couth.