What is missionary? How to use in English

The word "missionary" has its roots in the Latin word "missio," meaning "travel" or "journey." This Latin term was adapted into Middle English as "missioun," referring to a sent or appointed person. The concept of a mission or sending someone on a specific task dates back to the early Christian Church, where bishops and apostles were sent by Jesus Christ to spread his teachings. The term "missionary" itself was first used in the 16th century to describe those who were sent by the Roman Catholic Church to evangelize and convert pagans to Christianity. As Protestantism emerged, the term also applied to those who were sent out by Protestant denominations to spread the Gospel. Today, the word "missionary" encompasses individuals or groups who are sent to share their faith and promote their beliefs with others, often across cultural and linguistic boundaries.