Impracticable

At one time it was thought impracticable for man to fly.

His plan sounds impracticable.

The reader will doubtless take up this little work with an incredulous smile, supposing that he is about to peruse the impracticable schemes of some good citizen of Utopia. I would, therefore, in the first place, beg of him to lay aside all prejudice, and treat seriously and critically the question brought before him.

It would evidently be utterly impracticable to throw the whole traditional nomenclature overboard and create a totally new one.

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.

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.

And yet this tough impracticable heart / Is govern'd by a dainty-finger'd girl ; […]

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.

They were not allowed, of course, to join us in the sitting room, partly that their practice might not be disturbed, but principally, that I was looked upon as an utter impracticable.

The strict constructionists had dwindled to a few impracticables, headed by John Randolph.