To convert (a text written in code, or a coded signal) into normal language.

To understand or make sense of something that is difficult to understand.

किसी ऐसे चीज़ को समझना जो समझना कठिन है।

English Usage: She took hours to decipher the complex instructions.

Hindi Usage: उसने जटिल निर्देशों को समझने में कई घंटे बिताए।