not possible; that cannot be put up with

beyond the bounds of possibility

that which is not possible

beyond the bounds of possibility

that cannot be put into practice or used

unrealistic

not sensible because not doing well or achieving that which is intended

unrealistic

not accessible

out of reach

not approachable

inaccessible

that cannot be achieved

inaccessible

not obtainable

out of reach

not practicable

impossible