sunken

1 curved inward our convalescing guest's sunken cheeks soon filled out on a diet of my mother's cooking Synonyms concave, dented, depressed, dished, indented, recessed, hollowRelated Words alveolar, cavernous, crescentic, cuplike, cupped, cuppy, recurved; dimpled, pockmarked; compressed, condensed, contracted, diminished, reducedNear Antonyms ballooning, bloated, blown up, bulbous, distended, enlarged, expanded, extended, inflated, jutting, projecting, puffed, puffy, risen, swollen; domed, global, globular, round, rounded, sphericalAntonyms bulging, cambered, convex, protruding, protrusive, protuberant

2 living, lying, or occurring below the surface of the water diving for sunken treasure Synonyms aquatic, submarine, submerged, underwaterRelated Words oceanic; undersea; abysmal, abyssal, deep, deep-sea, deepwater