impassable

is likely misspelled.

has no English definition.

As an adjective impassable

is incapable of being passed over, crossed, or negotiated.

As adjectives the difference between impossible and impassable

is that impossible is not possible; not able to be done or happen while impassable is incapable of being passed over, crossed, or negotiated.

As a noun impossible

is {{cx|obsolete|lang=en}} an impossibility.

Impassable is a related term of thick.

As adjectives the difference between impassable and thick

is that impassable is incapable of being passed over, crossed, or negotiated while thick is relatively great in extent from one surface to the opposite in its smallest solid dimension.

As an adverb thick is

in a thick manner.

As a noun thick is

the thickest, or most active or intense, part of something.

As a verb thick is

(archaic|transitive) to thicken.

Impassable is a related term of solid.

As an adjective impassable

is incapable of being passed over, crossed, or negotiated.

As an acronym solid is

(programming|object-oriented).

As an adjective impassable

is incapable of being passed over, crossed, or negotiated.

As a noun pass is

pass (between mountains ).

As an adjective impassable is

incapable of being passed over, crossed, or negotiated.

Impassable is a related term of inaccessible.

As adjectives the difference between impassable and inaccessible

is that impassable is incapable of being passed over, crossed, or negotiated while inaccessible is not able to be accessed; out of reach; inconvenient.

As a noun inaccessible is

(mathematics) an uncountable regular cardinal number that is a limit cardinal.

Impassable is a related term of dense.

As adjectives the difference between impassable and dense

is that impassable is incapable of being passed over, crossed, or negotiated while dense is having relatively high density.

Impassable is a related term of sealed.

As adjectives the difference between impassable and sealed

is that impassable is incapable of being passed over, crossed, or negotiated while sealed is closed by a seal.

As a verb sealed is

(seal).