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Definition of undecipherable

undecipherable

/ˌʌndɪˈsaɪfərəbəl/
un · de · ci · pher · a · ble
Adverb:undecipherably
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undecipherable Lexical Profile

undecipherable Game Scores & Validity

• adjective

1

Not able to be read, decoded, or converted into intelligible language (especially of handwriting, text, or a coded message).

Example

"The physician's hurriedly scribbled prescription was completely undecipherable to the pharmacist."

2

Impossible to understand, interpret, or make sense of (of a person's expression, behavior, or situation).

Example

"She listened to the proposal with an undecipherable expression that gave away none of her thoughts."

Synonyms
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Antonyms
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• Rhymes for undecipherable

• Nearby Words

undeceived
undecided
undecidedly
undecipherable
undecipherably
undeciphered
undeclared

Word Origin & Etymology

Formed in English from the prefix 'un-' (not), the verb 'decipher' (from French 'déchiffrer', ultimately tracing back to the Arabic 'sifr' meaning 'zero' or 'empty'), and the suffix '-able'.

Cite this Entry

Wordmom. (2026). Definition of Undecipherable. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/undecipherable
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