impossible

adj.

[1]	hopeless , impracticable , inconceivable , unimaginable , unthinkable , unattainable , unsuitable , out of the question , unachievable , unrealizable , unworkable , unresolvable , unsolvable
[2]	absurd , ludicrous , preposterous , ridiculous , illogical , unworkable , outrageous , farcical , outlandish , crazy , weird
[3]	inconceivable , out of the question , unimaginable
[4]	insufferable , unacceptable , unsufferable