repertoire

English borrowed repertoire from French répertoire, which came from Middle French repertoire, tracing back to Late Latin repertōrium, meaning an inventory or list.

The word began as a term for a list or inventory in Late Latin, and that sense of a catalogued collection carried through French into English, where it settled into describing the full range of works or skills a person has ready to perform.

It's a doublet of repertory — the two words descend from the same Late Latin root, repertōrium, but arrived in English by slightly different paths.