unendable
unfinishable
inconcludable
undefeatable
insoluble
unvanquishable
inexpugnable
unstayable
inexorable
unendly
uneschewable
inseverable
inconquerable
insolvable
unceasable
unendingly
incompletable
implacable
uncrackable
interminate
inextricable
terminable
unshatterable
termlessly
insuperable
neverending
unsuperable
unescapability
undefeatably
unstanchable
inexterminable
unsubduable
infrangible
unsolvable
incicurable
unsolvably
unavoidable
impossible
inerrable
no-win situation
endonormatively
unsurvivable
perpetually
nonpossibility
unconquerable
indescribable
unsated
unsinkably
may God have mercy on your soul
unemptiable