unclimbable en · ADJ
Etymology
Etymology tree English un- English climb Proto-Indo-European *-dʰlom Proto-Italic *-ðlom Proto-Italic *-ðlis Latin -bilis Latin -ābilis Old French -ablebor. Middle English -able English -able English unclimbable From un- + climb + -able.
Meanings
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(not-comparable) Not able to be climbed
The base of each [floodlight] tower forms an outdoor-type sub-station compound with a 7ft unclimbable fence which houses the extra high-voltage ring main switchgear, the transformer and the medium voltage switchgear.
1963 August, “The semi-automatic Tees Yard of the North Eastern Region”, in Modern Railways, pages 123–124:Yet every world should have at least one unclimbable mountain.
1970, Larry Niven, Ringworld, page 118:Those cliffs are unclimbable.