資料來源 : Webster's Revised Unabridged Dictionary (1913)

Unsupportable \Un`sup*port"a*ble\, a.
   Insupportable; unendurable. -- {Un`sup*port"a*ble*ness}, n.
   --Bp. Wilkins. -- {Un`sup*port"a*bly}, adv.

資料來源 : WordNet®

unsupportable
     adj : not able to be supported or defended