Catechism number 1328

The inexhaustible richness of this sacrament is expressed in the different names we give it. Each name evokes certain aspects of it. It is called: Eucharist, because it is an action of thanksgiving to God. the Greek words eucharistein¹³⁹ and eulogein¹⁴⁰ recall the Jewish blessings that proclaim - especially during a meal - God's works: creation, redemption, and sanctification.