Pathless is a related term of impermeable.
As adjectives the difference between pathless and impermeable
is that pathless is without a path or trail while impermeable is waterproof.
As a noun impermeable is
raincoat.
pathless
English
Adjective
(
en adjective)
Without a path or trail.
(figurative) unexplored
Synonyms
* (unexplored) trackless, uncharted, unknown, virgin
impermeable
English
Adjective
(
en adjective)
impossible to permeate
not allowing passage, especially of liquids; waterproof
Synonyms
* sealed
Antonyms
* permeable
Related terms
* nonpermeable
* permeability
* impermeability