Second, they broke down the wall between teen music and adult music, a wall that had been insuperable until then.
Not necessarily an insuperable or lethal problem, but a problem that must be overcome—and certainly not a plus.
But he prefers women - and most certainly does not love the baron, for the insuperable reason that he loves nobody except himself.
The plan found an insuperable obstacle in the political conditions of the time.
But for the heroism of the signallers, it would have been insuperable.
With the information they had, Moses and Joshua may have believed that there were no insuperable difficulties.
Gaming relieved me from that insuperable listlessness by which I was oppressed.
He went along the coast for a whole day and a night, passing around the reef which formed an insuperable barrier.
But the great Milton has proved that this objection is not insuperable.
It was all he needed to complete his plan; and it had seemed an insuperable bar.
mid-14c., "unconquerable," from Latin insuperabilis "that cannot be passed over, unconquerable," from in- "not, opposite of" (see in- (1)) + superabilis "that may be overcome," from superare "to overcome," from superus "one that is above," from super "over" (see super-). Figurative use from 1650s. Related: Insuperably.