unclimbable
adjective
un·climb·able ˌən-ˈklī-mə-bəl 
: not able to be climbed
unclimbableness noun
Example Sentences
Recent Examples on the Web The first three films are standard fare: pro climbers on quests to climb the unclimbable. 
Peter Vigneron, Outside Online, 12 Dec. 2020 Half Dome fell off and likely left the route unclimbable, Climbing reported Monday. The Editors, Outside Online, 7 July 2015 The unclimbable, barbed wire barricades, along with tens of thousands of National Guard troops stationed in Washington, D.C., have made the nation's capital city look more like a warzone than the seat of democracy in recent days. Fox News, 21 Jan. 2021 No Texas Tech team has been able to climb the unclimbable hill that is beating a Matt Campbell Iowa State team. Brice Paterik, Dallas News, 2 Sep. 2020 The hills were covered in wide sprays of holly oak, then thick bushes, then slopes as unclimbable as paper. Ailsa Ross, Longreads, 9 Aug. 2019 For a while, Nanda Devi was closed by the Indian government because it was considered unclimbable. Colleen Shalby, latimes.com, 3 June 2019 At 13, Fred and two friends reached the top of Mount Despair, a rugged 7,292-foot peak in the North Cascades that mountaineers had considered unclimbable. Robert D. Mcfadden, New York Times, 31 Oct. 2017 In Coronado, Strickland said the suicide-prevention collaborative has been eyeing as a possible solution the kind of inward-tilting, unclimbable fencing that was installed on the Cold Spring Canyon Bridge in Santa Barbara County. John Wilkens, sandiegouniontribune.com, 20 May 2017 See More
Peter Vigneron, Outside Online, 12 Dec. 2020 Half Dome fell off and likely left the route unclimbable, Climbing reported Monday. The Editors, Outside Online, 7 July 2015 The unclimbable, barbed wire barricades, along with tens of thousands of National Guard troops stationed in Washington, D.C., have made the nation's capital city look more like a warzone than the seat of democracy in recent days. Fox News, 21 Jan. 2021 No Texas Tech team has been able to climb the unclimbable hill that is beating a Matt Campbell Iowa State team. Brice Paterik, Dallas News, 2 Sep. 2020 The hills were covered in wide sprays of holly oak, then thick bushes, then slopes as unclimbable as paper. Ailsa Ross, Longreads, 9 Aug. 2019 For a while, Nanda Devi was closed by the Indian government because it was considered unclimbable. Colleen Shalby, latimes.com, 3 June 2019 At 13, Fred and two friends reached the top of Mount Despair, a rugged 7,292-foot peak in the North Cascades that mountaineers had considered unclimbable. Robert D. Mcfadden, New York Times, 31 Oct. 2017 In Coronado, Strickland said the suicide-prevention collaborative has been eyeing as a possible solution the kind of inward-tilting, unclimbable fencing that was installed on the Cold Spring Canyon Bridge in Santa Barbara County. John Wilkens, sandiegouniontribune.com, 20 May 2017 See More Word History
First Known Use
circa 1540, in the meaning defined above