impracticable

From im- +‎ practicable.

impracticable (comparative more impracticable, superlative most impracticable)

Not practicable; impossible or difficult in practice.
Antonym: practicable
- 1952 February, H. C. Casserley, “Permanent Wayfarings”, in Railway Magazine, page 77:
  It has not been used for many years, and although it was impracticable to photograph the engine in the small confines of the shed it was possible to obtain a picture of the plate which it still carries showing the former ownership.
- 2003, Angela Y. Davis, chapter 1, in Are Prisons Obsolete?‎, archived from the original on 19 May 2023, pages 9-10:
  Prison abolitionists are dismissed as utopians and idealists whose ideas are at best unrealistic and impracticable, and, at worst, mystifying and foolish. This is a measure of how difficult it is to envision a social order that does not rely on the threat of sequestering people in dreadful places designed to separate them from their communities and families.
impassable (of a passage or road)
(obsolete, of a person or thing) unmanageable
- 1713, Nicholas Rowe, The Fair Penitent‎, published 1797:
  And yet this tough impracticable heart / Is govern'd by a dainty-finger'd girl ; […]
- c. 1841, Ralph Waldo Emerson, Journals and Miscellaneous Notebooks‎, published 1960, page 18:
  H. is a person of extraordinary health & vigor, of unerring perception, & equal expression; and yet he is impracticable, and does not flow through his pen or (in any of our legitimate aqueducts) through his tongue.

not practicable

impassable

impracticable (plural impracticables)

English