- Cruise mission described as unachievable - Hopeless (situation) - Insurmountable - non viable - Not able to be done or to happen - 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. - An impossibility.
- Anaesthetise 500 Romans in a hopeless situation - Anaesthetise damaged head in a situation that can’t progress - Blind alley - Cul-de-sac - Cul-de-sac has a hopeless future - Impasse - Lacking prospects (job)