infeasible

They cancelled the infeasible Asteroid Redirect Mission, and declared that the lunar orbit platform needed to be a “Gateway” to actually go somewhere.

But neither means engagement is either infeasible or on the skids.

These measures are not the entire universe of policy requirements, and some may prove infeasible.

This is not a line-for-line translation; that the author found infeasible.

The commander also rejects, at this point, courses of action found to be infeasible of accomplishment.

The (p. 161) Service Forces commander called integration infeasible "for the present and foreseeable future."

With good pupils it is not infeasible to read the whole of the Odyssey, since facility increases very rapidly toward the end.

He sought to talk discontentedly of the project, as if he found it infeasible.