undeliverable

U1N1D2E1L1I1V4E1R1A1B3L1E1

adjective

Not able to be delivered.

“The dead letter office keeps undeliverable mail.”

OriginEnglish deliverable ← Middle English un- ← Old English un- →
Less commonScrabble 19
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Meanings

adjectiveundeliverable (not comparable)
  1. not comparableNot able to be delivered.

    The dead letter office keeps undeliverable mail.

    1 more example

    The ambitious project to build 500 new hospitals was later deemed to be undeliverable.

nounundeliverable (plural undeliverables)

plural undeliverables

  1. A message, parcel, etc. that cannot be delivered.

Origin

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Germanic*un-
  4. Proto-West Germanic*un-
  5. Old Englishun-
  6. Middle Englishun-
  7. Englishun-
  8. Englishdeliverable
  9. Englishundeliverable

From un- + deliverable.

Full word history & related roots →
Cite this entry
APA

undeliverable. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/undeliverable

MLA

“undeliverable.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/undeliverable. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “undeliverable,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/undeliverable.

Source: undeliverable on Wiktionary, CC BY-SA 4.0.