a. (UN-1 7 b.)

1

  In frequent use from c. 1880.

2

1533.  Bellenden, Livy, V. xv. (S.T.S.), II. 199. At þe fute of þe montanis, quhilkis stude sa hie aganis him þat þai apperit vnclymabil.

3

1827.  Lincoln & Lincolnshire Cabinet, 9. The almost unclim[b]able street which, as before stated, runs directly up the hill.

4

1892.  Rider Haggard, Nada the Lily, 211. It was of no great height, and yet unclimbable, for … the sides of it were sheer.

5