trapdoor

Hidden floor panel

A trapdoor is a hinged or sliding door set into a floor, ceiling, or roof, providing access to a space below or above.

Trapdoors appear in stages for dramatic entrances and exits, in attics for storage access, and in adventure stories for escapes and surprises.

In computing, a trapdoor is a hidden method of bypassing security—a secret way in: The programmer left a trapdoor in the code.

cellar

hatch

Opening in deck or floor

storage · dungeon · wine cellar · root cellar · storm shelter · crawlspace · foundation · stairs · ladder · darkness

mechanism

hinge

Movable connecting joint

  • latchDoor-securing catch
  • boltThreaded rod for nuts
  • lockMechanism requiring a key

handle · pivot · flap · cover · panel · spring-loaded · counterweight · lever · release · trigger

surprise

ambush

Surprise strike from concealment

twist · startle · sudden · drop · fall · plunge · pitfall · snare · trick · deception

escape

exit

Way to leave

flee · elude · bolt · egress · secret passage · quick escape · rescue · safety · pursuit · chase

stage

proscenium

Theater's architectural frame

  • fliesWinged buzzing pests
  • wingsLimbs for flight
  • apronWaist-tied protective garment

scrim · batten · cyclorama · scenery · backdrop · curtain · props · stagehand · pit · downstage

computing

backdoor

Hidden bypass mechanism

bypass · authentication · encryption · hack · malware · access · code · software · system · breach

Categories
Opposites
visibility and openness of passage

trapdoormain entrance

Principal point of entry

front door · grand entrance · archway · public entrance · foyer

type of vertical passage

trapdoorstaircase

Indoor flight of steps

stairway · stairs · ladder · escalator · grand staircase

function as entrance vs. barrier

trapdoorblocked passage

dead end · wall · barrier · ceiling

Phrases
Family

trapdoors, trapdoor spider, trapdoor spiders

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G