decipher
Americanverb (used with object)
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to make out the meaning of (poor or partially obliterated writing, etc.).
to decipher a hastily scribbled note.
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to discover the meaning of (anything obscure or difficult to trace or understand).
to decipher hieroglyphics.
- Synonyms:
- explain, unravel, solve, comprehend
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to interpret by the use of a key, as something written in cipher.
to decipher a secret message.
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Obsolete. to depict; portray.
verb
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to determine the meaning of (something obscure or illegible)
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to convert from code into plain text; decode
Other Word Forms
Derived Forms
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decipherabilitynoun
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decipherernoun
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deciphermentnoun
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decipherableadjective
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undecipherableadjective
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undecipheredadjective
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undecipherablyadverb
Inflected Forms
Participles
Conjugated Forms
Present
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deciphersimple
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decipherssimple
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have decipheredperfect
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has decipheredperfect
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am decipheringprogressive
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are decipheringprogressive
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is decipheringprogressive
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have been decipheringperfect progressive
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has been decipheringperfect progressive
Past
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decipheredsimple
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had decipheredperfect
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was decipheringprogressive
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were decipheringprogressive
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had been decipheringperfect progressive
Future
Etymology
Origin of decipher
First recorded in 1520–30; translation of Middle French déchiffrer; equivalent to de- + cipher
Explanation
Decipher means translate from code, or more generally, figure out. If you can’t decipher your teacher's writing, it means you can't read it. You might feel like you're being asked to decipher a code. During World War II, the Nazis used a machine called the Enigma to encode secret messages. An operator would type the message with a keyboard, which would activate a set of rotors, giving each letter a different value. The code was difficult for the Allies to crack, but eventually the code was deciphered by the British, hastening the end of the war.
Vocabulary lists containing decipher
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Dr Helen Paul, an economic historian at the University of Southampton, was one of the experts brought in to decipher 18th Century ledgers.
From BBC • Jun. 18, 2026
Administration officials fielded phone calls from executives and political allies trying to decipher whether Trump’s threat was a bluff or a prelude to an escalation.
From The Wall Street Journal • Apr. 8, 2026
Wall Street is trying to decipher who the software winners and losers will be as artificial intelligence capabilities ramp up.
From Barron's • Mar. 16, 2026
Their goal was not to decipher the symbols, which remain undecoded, but to measure their structural properties.
From Science Daily • Feb. 25, 2026
One May afternoon, I sat near a window at the west end of the queen’s gallery, trying to decipher the tortured wit of his latest letter.
From "Ophelia" by Lisa Klein
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
