When baptism is talked about in the Bible, the Greek word used is baptizo, meaning to “dip” or “immerse” under water, and several descriptions of baptisms suggest that people were immersed (Matthew 3:6, John 3:23, Acts 8:38). Finally, immersion best illustrates the believer’s identification with the death, burial, and resurrection of Jesus Christ (Romans 6:1-11, Colossians 2:12).
“... [they] went down into the water, and he baptized him.” — Acts 8:38