What is the meaning of Essi?

water

alternative form of esse (“to be”)

third-person singular feminine of a

ecstasy, X (drug)

plural of esso: they, them

inflection of ēssus:

1. genitive masculine/neuter singular
2. nominative/vocative masculine plural

genitive masculine/neuter singular

nominative/vocative masculine plural

to be

Source: wiktionary.org