Undoable and Unattainable

Undoable

Undoable adjective - Incapable of being solved or accomplished.
Usage example: a combat mission of that type is not only undoable, it's foolish

Unattainable is a synonym for undoable. In some cases you can use "Unattainable" instead an adjective "Undoable".

Unattainable

Unattainable adjective - Incapable of being solved or accomplished.
Usage example: unfortunately, world peace is probably an unattainable ideal

Undoable is a synonym for unattainable. You can use "Undoable" instead an adjective "Unattainable".
Cite this Source
Unattainable and Undoable. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/undoable/unattainable
Undoable & Unattainable. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/undoable/unattainable>.
Unattainable or Undoable. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/undoable/unattainable.
Google Ngram Viewer shows how "undoable" and "unattainable" have occurred on timeline