The term 'make hard to read' can be accomplished in a variety of ways. The crossword solutions for this term are encrypt (7 letters), ENCIPHER (8 letters), and ENCODE (6 letters). Encryption is the process of scrambling data so that it is unreadable without a key or password. Enciphering is similar to encryption, but it involves transforming data into another form, such as a code or cipher. Encoding is the process of transforming data into a different format, such as a binary code. All three of these processes make data difficult to read, thus making it hard to understand.