Eucharist

Eucharist (n.): a spiritual communion with God; the Catholic Sacrament in which bread and wine are changed  into the Body and Blood of Christ.

Eucharist comes from the Greek eucharistein, meaning "to give thanks." This is because the Eucharist is one of the greatest ways of giving thanks to God.

Bibliography

       Rev. Socias, James. Introduction to Catholicism: A Complete Course. Woodridge, Illinois: Midwest Theological Forum, 2011.