Search Result for "unclimbable": 
Wordnet 3.0

ADJECTIVE (2)

1. incapable of being ascended;
[syn: unscalable, unclimbable]

2. incapable of being surmounted or climbed;
[syn: unsurmountable, unclimbable]



WordNet (r) 3.0 (2006):

unclimbable
    adj 1: incapable of being ascended [syn: unscalable,
           unclimbable] [ant: scalable]
    2: incapable of being surmounted or climbed [syn:
       unsurmountable, unclimbable]