Neglect it — go on as heretofore, craving, whining, and idling — and suffer the results of your idiocy, however bad and insuperable they may be.
Not a hint, however, did she drop about sending me to school: still I felt an instinctive certainty that she would not long endure me under the same roof with her; for her glance, now more than ever, when turned on me, expressed an insuperable and rooted aversion.
Am I severed from you by insuperable obstacles?
I am in a condition to prove my allegation: an insuperable impediment to this marriage exists.
I have called it insuperable, and I speak advisedly.
There are no more uses of "insuperable" in the book.
Show samples from other sources
This objection would be insuperable if Homer had been an Ithakan.
Homer -- The Odyssey
I came to the conclusion that difficulties, well-nigh insuperable, lay between me and the safe possession of the beautiful little vessel.