unscalable Synonyms

unclimbable unobtainable impregnably unreachable unachievable unattainable un-come-at-able uncrossable unpierceable untraversable un-get-at-able assailable unbreachable unassailable forbidding impassable impenetrable impracticable impregnable inaccessible insurmountable unconquerable unapproachable unbridgeable be unpassable