(ˈ)im+ adjective
Etymology: in- (I) + passable
: incapable of being passed: as
a. : incapable of being traveled, traveled through, or crossed
an impassable road
an impassable jungle
an impassable river
b. : incapable of being put into circulation
counterfeit bills so crude they were impassable
c. : insurmountable
an impassable obstacle to discussion
• im·passableness “+ noun
• im·passably “+ adverb