uncrackable

U1N1C3R1A1C3K5A1B3L1E1

adjective

That cannot be cracked; unbreakable.

OriginEnglish crackable ← Middle English un- ← Old English un- →
Scrabble 21
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Meanings

adjectiveuncrackable (not comparable)
  1. not comparableThat cannot be cracked; unbreakable.
  2. not comparableThat cannot be broken into.

    I may as well inform you that no crib is really uncrackable, though the Cyrus J. Coy Co.'s Safe Deposit on West 24th Street, N.Y., comes nearest the kernel.

    1914, Ernest Bramah [pseudonym; Ernest Brammah Smith], Max Carrados

Synonyms & antonyms

Also see
undecryptable

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. Englishcrackable
  9. Englishuncrackable

From un- + crackable.

Full word history & related roots →

Translations

German unknackbar, unbrechbar
  • unknackbarof a code: that cannot be cracked, unbreakable
  • unbrechbarof a code: that cannot be cracked, unbreakable
Cite this entry
APA

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

MLA

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

Chicago

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

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