modified
mountainlike, mountain, with mountains, difficult, barbarous, wild, untamed, strange, remote, uncivilized, rude, crude, unpopulated, solitary, unfamiliar, hard to penetrate, isolated, steep, lofty, hilly, alpine, upland, aerial, elevated, volcanic, towering, ridged, craggy, cliffy, rugged; see also high 2, rocky.
Antonyms low*, small, flat*.