insurmountable

At halftime, the 14-point Ducks lead seemed a lot larger and, it turns out, was insurmountable.

Until now, the prospect of placing an NFL team—or perhaps an entire division—across the Atlantic had faced the seemingly insurmountable logistical hurdle of travel times.

Six points from two games or four points in the right order - one against Greece, three against Denmark - doesn't seem insurmountable when Scotland have already achieved 10 points in four games.

With more than 1,200 pages to plough through, it's often regarded as the Everest of literature with prose as insurmountable as the famed peak.

Learning a musical instrument can be an arduous journey, one often fraught with blistered fingers, frayed patience and what can seem like an endless series of insurmountable hurdles.