I. ˈəŋ-(ˌ)kō, -kə adjective
Etymology: Middle English (Scots) unkow, alteration of Middle English uncouth
Date: 15th century
1. chiefly Scottish
a. : strange , unknown
b. : uncanny , weird
2. chiefly Scottish : extraordinary
II. adverb
Date: 1721
: extremely , remarkably , uncommonly
you keep your room unco hot — R. L. Stevenson
III. noun
( plural uncos )
Date: 1785
1. plural , chiefly Scottish : news , tidings
2. chiefly Scottish : stranger