In episode 4 of Shigatsu wa Kimi no Uso (Your Lie in April), Kaori says a prayer "Elohim, Essaim... Elohim, Essaim I implore you" before the performance. What does it mean?
Both of the words "Elohim" and "Essaim" could be meaning a variety of things. But my speculation goes as follows:
From this Reddit thread:
"Eloim" is "God" or "Powers", "Essaim" might be "Locusts" or "Swarm".
I'm thinking that she's offering her soul to the devil/the angels/god in exchange for being able to captivate her audience.
This isn't Faust; it's not a serious treatment of pacts. The Japanese adore Christian mythology, similar to how the West adores Eastern mythology. In effect, she's doing the same thing as someone in a Western work invoking his "chi" or whatever. (It's shōnen; teenage boys love foreign mysticism.)
It's a chant common in anime and manga (For example, it occurs in Gugure! Kokkuri-san ep12 this season), if recited 3 times can give good luck or summon demons. Its origin comes from The Grand Grimoire, it's "The secret of the Black hen, a secret without which one can not count on the success of any cabala". Elohim as mentioned is Hebrew for God, Essaim could be french for swarm, or a way of writing Jesse; Jesse -> Esse + im (hebrew plural). You can read more here: http://moto-neta.com/anime/eloim-essaim/ (Japanese)
Elohim(אֱלֹהִים) is a Hebrew word that means either 1) "gods" in the plural, or 2) "God." "El" (אֵלִי) and "Eloi" (אֶלֹהִי) are "God," and the "-him" suffix (הִים) makes it plural. So it would literally mean "gods" in the plural; however, it is also used in the specific case of referring to the monotheistic Judeo-Christian God. It is found 2602 times in the Hebrew Bible.
It does not mean "powers" as Hashirama Senju wrote.
"Essaim" is French for "swarm." This word does not occur in Hebrew.