x1 is any referent of x2 ; x2 has a set of referents, but the difference between the members of the set is not important
One possible interpretation of xe'e. (xe'ere lo mu plise) → (re nalvaimenre be lo mu plise); (xe'ere plise) → (re nalvaimenre be ro plise). See le'elkai, itca, menre. Shortening: nalvaime