1) Awful 2) Debilitating 3) Excruciating 4) Horrible 5) Incapacitating 6) Insufferable 7) Insupportable 8) Intolerable 9) Loathsome 10) Overwhelming 11) Unendurable 1) Impossible to bear 2) Insufferable 3) Insupportable 4) Intolerable 5) Not bearable 6) Painful 7) Sculpture of bear 8) Sweltering 9) Unacceptable 10) Unendurable 11) Unspeakable 12) Worse than awful 
[adj] - impossible to bear
not bearable; unendurable; intolerable.