Mashiach (mah-SHEE-ahkh) is מָשִׁיחַ in Hebrew. It is used for the modern name Messiah, but it literally means "anointed one". It's origin is from the root word mashach which means "to anoint or swear with oil".
Mashiach is a name used for Jesus before Messiah because he was consecrated by God. People would anoint their kings, priest, and prophets but it was always meant to be done in submission to God. Jesus is the only divine savior. He is the one that provides peace through a relationship with God.
Mashiach is the son of God and the ultimate sacrifice for you and me. He brought the good news into the world, but the world did not understand. The good news is that he is the one that sets you free. He fulfilled the prophecies revealing God's splendor. Walk with him in faith and you become the righteous display of God.
When you pray using the name Mashiach it is to humble yourself to submit to Jesus' authority. You use it to seek to know Him. You pray for anointment over your service to him. You seek his guidance on how to serve him. You are turning your ministry or service over to him because you recognize that you can't do it without him.
2 Samuel 7:12-16, Psalm 22:11-18, Isaiah 7:13-16, 9:6-7, 11:1-5, 53:1-9, 61:1-3, Jeremiah 23:5-6, Micah 5:2-4, & Zechariah 9:9-13