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[skey-luh-buh l] /ˈskeɪ lə bəl/
capable of being scaled:
the scalable slope of a mountain.
Origin of scalable
First recorded in 1570-80; scale3 + -able
Related forms
scalableness, noun
scalably, adverb
unscalable, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for unscalable
Historical Examples
  • It appears completely detached from the east wall, aloof and unscalable.

  • It was for a long time supposed to be unscalable from the north side.

    The Columbia River William Denison Lyman
  • They are a boundary, a dividing line, a wall impregnable and unscalable.

    The Night-Born Jack London
  • She felt shut in from the world, lost in an unscalable rut of the earth.

  • The bridge was four miles above, but unscalable walls made it impossible for him to reach that.

    I Married a Ranger Dama Margaret Smith
  • On the right ran the wall of the stockade, impenetrable and unscalable, and it was a long two miles to the north gate.

    The Doomsman Van Tassel Sutphen
  • He looked back at the Gerns and saw they were within a hundred feet of the—for them—unscalable wall of the stockade.

    Space Prison Tom Godwin
  • Instead of rearing an unscalable barrier of gloomy mountains, Nature here showed a level front of sullen hostility.

  • At each side rises an unscalable rock wall with a height of from three to six hundred feet.

  • In the suburb, where "sets" are divided one from another by unscalable barriers, she could not have aspired to him.

    The Price of Love

    Arnold Bennett
British Dictionary definitions for unscalable


capable of being scaled or climbed
(computing) (of a network) able to be expanded to cope with increased use
Derived Forms
scalableness, noun
scalably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for unscalable



1570s, "able to be climbed;" see scale (v.1) + -able. From 1936 as "able to be graded by scale." Related: Scalably; scalability.

Online Etymology Dictionary, © 2010 Douglas Harper
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