Pronunciation: /ˈsaɪfər/
noun a secret or disguised way of writing; a code
A1 A cipher is a secret code used to encrypt messages.
A2 The spy used a cipher to communicate with headquarters.
B1 The detective cracked the cipher to solve the case.
B2 The ancient Egyptians used ciphers to protect their tombs.
C1 The mathematician created a complex cipher that was impossible to break.
C2 The hacker was able to decrypt the cipher and access sensitive information.
verb to put (a message) into secret writing; encode
A1 He tried to cipher the secret message but couldn't figure it out.
A2 She enjoys ciphering codes and puzzles in her free time.
B1 The spy needed to cipher the encrypted document to uncover the hidden information.
B2 The hacker was able to quickly cipher the password and gain access to the system.
C1 The cryptographer was skilled at ciphering complex algorithms for secure communication.
C2 The expert cryptanalyst could easily cipher any code or encryption method.
formal The intelligence agency used a complex cipher to encrypt classified information.
informal I can't figure out this cipher puzzle, it's too hard!
slang Yo, pass me the cipher so I can decode this message.
figurative His emotions were like a cipher, impossible to decipher.
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