IPA: /ˈkrɪptəˌɡræm/
KK: /ˈkrɪptəˌɡræm/
A piece of writing that is written in a secret code, making it difficult to read without knowing the code.
The detective solved the cryptogram to reveal the hidden message.
Cryptogram → It is formed from "crypto-" (from Greek "kryptos", meaning hidden) and "gram" (from Greek "gramma", meaning something written). The word "cryptogram" refers to a written message that is hidden or encoded.
Think of something that is 'hidden' ('crypto-') in a 'written' form ('gram') — that's what a cryptogram is.