Cyber-MISSIVE is a term used to describe an email sent over the internet. It is a combination of the words 'cyber' and 'MISSIVE, ' which both refer to communication. Cyber is derived from the Greek word for 'STEERSMAN' and is used to refer to computers and computer networks, while MISSIVE is derived from the Latin word for 'to send.' Together, they form the term cyber-MISSIVE, which is used to refer to emails sent over the internet.