Synonyms of indecipherable

indecipherable

adjective

ˌin-di-ˈsī-f(ə-)rə-bəl 

as in illegible

incapable of being read or deciphered

after so many years the paper label in the drawer of the antique desk is indecipherable

Synonyms & Similar Words

• illegible
• obscure
• undecipherable
• unreadable
• faint
• unclear
• indistinct

Antonyms & Near Antonyms

• readable
• legible
• clean
• fair
• decipherable

Example Sentences

Recent Examples of indecipherable

One of the most exciting uses of AI has to be helping historians and archaeologists decipher previously indecipherable or untranslatable ancient texts. — Jeremy Kahn, Fortune, 23 June 2026

But the messy sound rendered his singing indecipherable, a problem that persisted throughout the 2-hour and 45-minute performance. — Melissa Ruggieri, USA Today, 14 June 2026

In the calls obtained by PEOPLE on Thursday, the 20 year old can be heard switching into a fast-paced, virtually indecipherable code language while speaking with her mother, Natalie. — Ryan Coleman, Entertainment Weekly, 21 May 2026

Roach posted video of the confrontation on X, most of which is indecipherable due to crosstalk. — Ashley Grams, CBS News, 15 May 2026