SHALLOW is validvalid

having little depth [adj SHALLOWER, SHALLOWEST] : SHALLOWLY [adv], SHALLOWNESS [n] / to make shallow [v SHALLOWED, SHALLOWING, SHALLOWS]

51,494 of 196,601 in NWL2023·also valid in CSW24

not deep [adj SHALLOWER, SHALLOWEST, SHALLOWLY] / to become shallow [v -ED, -ING, -S]