Where does “in esse” come from?

in esse (English) comes from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

Ancestry of “in esse”, step by step

StepLanguageWordMeaning
1Latinînin, at, on, upon, from (space)
2Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
3Proto-Italicenin
4Proto-Indo-Europeanh₁énin
Every word from Proto-Indo-European h₁én →Every word from Proto-Italic en →Every word from Latin en →