1. converted (a coded or unclear message) into understandable language
Usage: past tense of decipher
2. figured out the meaning of something difficult to understand
Usage: past tense of decipher

Examples

• The archaeologist deciphered the ancient hieroglyphs on the tomb wall.
• She deciphered the secret code hidden in the letter.
• The doctor deciphered the patient’s illegible handwriting on the form.
• Scientists deciphered the genetic sequence after years of research.
• He finally deciphered what his teacher meant by the cryptic comment.
• The detective deciphered the criminal’s coded messages.
• Scholars deciphered the meaning of the mysterious manuscript.