补全英语单词能解释就解释下哈

Puzzle - A puzzle is a game, toy, or problem designed to test ingenuity or knowledge. It can be a physical object like a jigsaw puzzle or a digital one like a riddle. Puzzles come in various forms, such as crosswords, Sudoku, or brain teasers, and are often used for entertainment or education.

Mystery - A mystery is something that is not known or understood. It can be a question or a situation that puzzles people. Mysteries are often solved through detective work or investigation. In literature, a mystery often involves a crime or a secret that needs to be uncovered.

Challenge - A challenge is something that tests your ability, skills, or determination. It could be a difficult task, problem, or competition. Challenging yourself can help you grow, learn new skills, and improve your abilities.

Solution - A solution is a method or answer that solves a problem or meets a need. It's the result of finding a way to deal with a difficult situation or question. Solutions can come in various forms, such as a plan of action, a new idea, or a creative approach.

Conundrum - A conundrum is a difficult or confusing situation that is hard to resolve. It's a problem or question that seems to have no clear answer or solution. Conundrums can be used in puzzles or as part of riddles to challenge the solver's thinking.

Enigma - An enigma is a person, situation, or thing that is mysterious or hard to understand. It can be something that has a secret or is not fully explained. Enigmas often require careful consideration and sometimes even intuition to solve or understand.

Enigma Machine - The Enigma machine was a device used in World War II for encrypting and decrypting messages. It was a complex machine that used a series of rotating wheels to create a code, making it extremely difficult for enemies to decode messages without the correct key.

CIPHER - A cipher is a method of writing or encrypting text in a way that only allows those who know the key or code to read it. Ciphers can be used for secure communication, and they come in various types, such as substitution ciphers, transposition ciphers, and polyalphabetic ciphers.

Encryption - Encryption is the process of converting information or data into a code to prevent unauthorized access. It's used to protect sensitive information, such as personal data or classified documents, from being read by those who are not authorized to do so.

Decryption - Decryption is the process of converting encrypted information back into its original, readable form. It's the reverse of encryption and is necessary to understand or use the information that has been encrypted.