- Cruise mission described as unachievable - Hopeless (situation) - Insurmountable - non viable - Not able to be done or to happen - Unbearable - Not possible; incapable of being done, of existing,
etc.; unattainable in the nature of things, or by means at command;
insuperably difficult under the circumstances; absurd or impracticable;
not feasible.
- Insufferable - Insupportable - Into the French, right? Competent but completely unbearable - Not able to be endured - Unbearable - Unendurable - Not tolerable; not capable of being borne or endured;
not proper or right to be allowed; insufferable; insupportable;
unbearable; as, intolerable pain; intolerable heat or cold; an
intolerable burden.