a. 忍耐不住的, 不合理的

[ adj ]
incapable of being justified or explained
<adj.all>

Insupportable \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.