T1R1A1P3D2O1O1R1
11 points
TRAPDOOR is validvalid
a lifting or sliding door covering an opening [n TRAPDOORS]
a door set in a floor or ceiling, flush with the surface [n -S]
a lifting or sliding door covering an opening [n TRAPDOORS]
a door set in a floor or ceiling, flush with the surface [n -S]