Where does “estre” come from?

Estre comes from Old French estre, a verb whose specific sense in this English context remains undetermined.

estre (English): The indoor layout or plan of a castle

Definitions

  1. The indoor layout or plan of a castle

Ancestry of “estre”, step by step

StepLanguageWordMeaning
1Old Frenchestreto be
2Late Latinessere—
3Latinsūmto be, exist
4Proto-Italicezomto be
5Proto-Indo-Europeanh₁ésmifirst-person singular present indicative of...
6Proto-Indo-Europeanh₁ēs-to be
Every word from Proto-Indo-European h₁ēs- →Every word from Proto-Indo-European h₁ésmi →Every word from Proto-Italic ezom →