insuperability


in·su·per·a·ble

I0173900 (ĭn-so͞o′pər-ə-bəl)adj. Impossible to overcome; insurmountable: insuperable odds.
[Middle English, from Old French, from Latin īnsuperābilis : in-, not; see in-1 + superābilis, superable; see superable.]
in·su′per·a·bil′i·ty n.in·su′per·a·bly adv.