inaccessible
unaccessible
impenetrable
trackless
uncharted
unknown
unpathed
untracked
untrodden
virgin
fathomless
godforsaken
illimitable
impassable
inextricable
marshy
moonlit
piny
roadless
snow-covered
treeless
uncultivated
unexplored
unfrequented
uninhabitable
unpeopled
untenanted
waterless
wooded