Is intiendes or entiedes a spanish word?

Entiendes is a Spanish Word. It is a form of the Spanish verb entender, which means "to understand." The form you asked about is the tú form, which is used for friends, people you know very well, or people who answer to you...like kids or someone who reports to you at work. So, literally entiendes means "you understand"...with the "you" being a person as described above. So, if I told my child or friend something, I might say, ¿Entiendes?"