concave depressed hollow hollowed indented dented recessed buried dished drawn haggard lowered cadaverous gaunt pinched dipped immersed lower settled incurved cupped excavated curved dimpled sectioned paragraphed scooped biconcave incurvated round sinking rounded sagging cavernous pitted arched alveolate cleft unoccupied vaulted striated notched domed humped embowed hemispheric bowed submerged aquatic submarine underwater submersed marine sunk subaqueous undersea subaquatic waterlogged subsurface inundated flooded drowned oceanic maritime saltwater pelagic seawater seagoing ocean sea thalassic freshwater watery water river briny amphibious amphibian swimming floating natatory fluvial waterly nautical seafaring naval oceangoing navigational abyssal coastal oceanographic sailing boating hydrographic shore seaside seashore natatorial littoral navigating