The Eucharist is the Christian ceremony that commemorates the Last Supper, (also known as the First Lord’s Supper) in which bread and wine are consecrated and consumed. The term also refers to the consecrated elements, especially the bread.
According to the online dictionary on Google, the term comes from the late Middle English: from Old French eucariste, based on ecclesiastical Greek eukharistia ‘thanksgiving,’ from Greek eukharistos ‘grateful,’ from eu ‘well’ + kharizesthai ‘offer graciously’ (from kharis ‘grace’).
It is literally a meal of thankfulness. We are eating thanks.
The last meal that Jesus shared with his disciples is described in all four Gospels (Mt. 26:17-30, Mk. 14:12-26, Lk. 22:7-39 and Jn. 13:1-17:26). In each story, he follows the Jewish practice by first giving thanks for the elements of the meal before consuming them. He blesses the food by blessing God, the creator of that food.
There is an echo of the miracles of feeding the large crowds of people.
The first instance, “the Feeding of the 5,000”, is in all four Gospels: Matthew 14:13-21, Mark 6:31-44, Luke 9:10-17 and John 6:5-15. The second instance, The “Feeding of the 4,000”, is reported by Matthew 15:32-16:10 and Mark 8:1-9. Both times, he gives thanks first. He is pointing out to his disciples and us that we must give thanks before we receive anything. Thankfulness must come first for miracles to occur.