mis•sion•ar•y [mish-uh-ner-ee], plural -ar•ies
noun - A person sent by a church into an area to carry on ministries of evangelism using activities such as preaching, teaching, education, medicine, etc. Derived from the Latin missionem (nom. missio), meaning "act of sending" or mittere, meaning "to send".
37 Then He [Jesus] said to His disciples, "The harvest is plentiful, but the workers are few.
38 "Therefore beseech the Lord of the harvest to send out workers into His harvest."
– Matthew 9:37-38 (NASB)