unpatrollable

As a noun terms

is .

As an adjective unpatrollable is

not patrollable; that cannot be patrolled.

As a noun patrol

is (military) a going of the rounds along the chain of sentinels and between the posts, by a guard, usually consisting of three or four men, to insure greater security from attacks on the outposts.

As a verb patrol

is to go the rounds along a chain of sentinels; to traverse a police district or beat.

As an adjective unpatrollable is

not patrollable; that cannot be patrolled.

As adjectives the difference between patrollable and unpatrollable

is that patrollable is capable of being patrolled while unpatrollable is not patrollable; that cannot be patrolled.