Hypertext Webster Gateway: "unsupportable"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Unsupportable \Un`sup*port"a*ble\, a.
Insupportable; unendurable. -- {Un`sup*port"a*ble*ness}, n.
--Bp. Wilkins. -- {Un`sup*port"a*bly}, adv.
From WordNet (r) 1.7 (wn)
unsupportable
adj : not able to be supported or defended
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