trapdoor

/ˈtræpdɔː/

//ˈtræpdɔː// noun

By · According to Wiktionary data (CC BY-SA) ·

"trapdoor" is a 8-letter English headword indexed on PlainSpell.

The verdict

“trapdoor” is uncommon English (frequency #53,919 among 27,828 “T” headwords), classed as a noun. The kind of spelling people second-guess.

#53,919
frequency rank, English
27,828
“T” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A hinged or sliding door set into a floor or ceiling.

Key facts for trapdoor
PropertyValue
Headwordtrapdoor
LanguageEnglish
Part of speechNoun
IPA/ˈtræpdɔː/
Letters8
Frequency rank#53,919
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “trapdoor” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). trapdoor lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Rare enough to double-check

trapdoor is uncommon English at frequency #53,919 among 27,828 “T” headwords, classed as anoun, transcribed /ˈtræpdɔː/. Rarity is why readers land here mid-draft. 5 senses are on record.

Zero misspellings are on record for trapdoor in our index, typically a sign the spelling maps closely to how the word sounds. This headword has no recorded confusable partner, since no other headword is close enough in sound or shape to pair with it.

Etymologically, the entry records: From trap + door. The correct English form is trapdoor, spelled T-R-A-P-D-O-O-R.

Definition

  1. 1
    A hinged or sliding door set into a floor or ceiling.
  2. 2
    Such a trap set into the floor of a stage to allow fast exits and entrances.
  3. 3
    A secret method of obtaining access to a program or online system; a backdoor.
  4. 4
    The special information that permits the inverse of a trapdoor function to be easily computed.
  5. 5
    A door in a level for regulating the ventilating current; a weather door.

Etymology

From trap + door.

Synonyms

drop

This word in other languages

trampa(Español)trappe(Français)Falltür(Deutsch)alçapão(Português)

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "trapdoor"?
"trapdoor" is spelled T-R-A-P-D-O-O-R. The IPA pronunciation is /ˈtræpdɔː/.
What does "trapdoor" mean?
As a noun, "trapdoor" means: A hinged or sliding door set into a floor or ceiling.
How do you pronounce "trapdoor"?
The IPA (International Phonetic Alphabet) transcription for "trapdoor" is /ˈtræpdɔː/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "trapdoor"?
From trap + door. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “trapdoor”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is T-R-A-P-D-O-O-R - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈtræpdɔː/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more English words and confusable pairs in the same reference. English words

Other uncommon English words near this rank

Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list