HOLLOW is validvalid

not solid [adj HOLLOWER, HOLLOWEST] : HOLLOWLY [adv], HOLLOWNESS [n] / to make hollow [v HOLLOWED, HOLLOWING, HOLLOWS]

21,664 of 196,601 in NWL2023·also valid in CSW24

to remove the interior [v -ED, -ING, -S] / not solid [adj HOLLOWER, HOLLOWEST, HOLLOWLY]