You searched for: “impassable
impassable (adjective), more impassable, most impassable
Impossible of being negotiated or crossed; unsurmountable: Parts of the road leading up the mountain were impassable due to a landslide obstructing the way.

The group of friends wanted to climb up to the peak of the mountain but were told that it was impassable because of heavy snow during the night.

This entry is located in the following units: -able (page 17) pass-, pace- (page 1)
impassable, impassible, impossible
impassable (im PAS uh buhl) (adjective)
Pertaining to something which is unable to be traveled or overcome: The severe snowstorm made the roads in the mountains impassable.
impassible (im PAS i buhl) (adjective)
Characterized as being incapable of feelings; immune to pain or suffering: Tamika's face was a masque, impassible to the suffering around her.
impossible (im PAHS i buhl) (adjective)
Unacceptable, awkward, incapable of happening: Up to 1969, it was believed that it was impossible to fly to the moon.

It was impossible to read Eric's impassible expression at the news of the efforts of his friends to cross the impassable mountain pass during the winter.