1. converts (a coded or unclear message) into ordinary language
2. figures out the meaning of something that is difficult to read or understand

Examples

• The cryptographer deciphers enemy messages during wartime.
• She deciphers the ancient hieroglyphics on the tomb wall.
• The doctor deciphers the illegible handwriting on the prescription.
• He slowly deciphers the faded text in the old manuscript.
• The computer program deciphers encrypted files automatically.
• The archaeologist deciphers symbols carved into the stone tablet.