1) French word used in English 2) Indefensible 3) Inexcusable 4) Not endurable 5) Unbearable 6) Unjustifiable 7) Unwarrantable 8) Unwarranted 1) Inexcusable 2) Insufferable 3) Intolerable 4) Unbearable 5) Unjustifiable 6) Unwarrantable 7) Unwarranted 
• (a.) Incapable of being supported or borne; unendurable; insufferable; intolerable; as, insupportable burdens; insupportable pain.
In`sup·port'a·ble adjective [ Latin insupportabilis : confer French insupportable . See In- not, and Support .] Incapable of being supported or borne; unendurable; insufferable; intolerable; as, insupportable burdens; insupportable pain. -- 
not endurable; unbearable; insufferable: insupportable pain. · incapable of support or justification, as by evidence or collected facts: an insupportable accusation.