adjective
insuperable
in-SOO-per-uh-bul/ɪnˈsuːpərəbl/
Impossible to overcome or solve.
The immense chasm presents an insuperable obstacle to the hiker's progress.

Etymology
The pieces mean “not capable of being overcome.” The underlying image is of something that cannot be passed over or surmounted, extended figuratively to difficulties too great to conquer.
In context
the difficulty of pressing them into school is almost insuperable they are no man's children and live on no man's land they deny their age give false addresses and pass over the boundaries
More examples
- Their differences prove insuperable, and the partnership ends.
- Even experts consider the technical problems insuperable.
- With enough patience, we may find that these difficulties are not insuperable.
Forms
insuperable
Similar words
- insurmountable
- Emphasizes obstacles or barriers that cannot be successfully overcome.
- insoluble
- Specifically describes problems or mysteries that cannot be solved.