\In`sup*port"a*ble\, a. [L. insupportabilis: cf. F. insupportable. See {In-} not, and {Support}.] Incapable of being supported or borne; unendurable; insufferable; intolerable; as, insupportable burdens; insupportable pain. -- {In`sup*port"a*ble*ness}, n. -- {In`sup*port"a*bly}, adv.