[n] a stretch of shallow water
[adj] lacking physical depth; having little spatial extension; downward ("shallow water"; "a shallow dish"); or inward from an outer surface ("a shallow cut"); or backward ("a shallow closet"; "established a shallow beachhead"); or outward from a center ((sports) "hit the ball to shallow left field")
[adj] not deep or strong; not affecting one deeply; "shallow breathing"; "a night of shallow fretful sleep"; "in a shallow trance"
[adj] lacking depth of intellect or knowledge; concerned only with what is obvious; "shallow people"; "his arguments seemed shallow and tedious"
[v] become shallow; "the lake shallowed over time"
[v] make shallow; "The silt shallowed the canal"
ankle-deep, fordable, knee-deep, light, reefy, shelfy, shelvy, shoal, shoal, shoal, shoaly, skin-deep, superficial, surface(a), wakeful