Decipher (verb)

1. To convert (a coded or unclear message or text) into a form that can be understood.
2. To figure out the meaning of something that is not clear or easy to understand.

Origin:

Late middle english: from old french decifrer, from latin decifrare, from de- (expressing reversal) + cifrare "to cipher".

Examples:

1. He spent hours trying to decipher the ancient text.
2. The detective was able to decipher the coded message.
3. The scientists were able to decipher the genetic code.
4. I had to work hard to decipher his handwriting.
5. I am trying to decipher the meaning behind his cryptic message.