pseudo-number that is unequal to itself.
Used with xi subscripts. Used to escape the fact that words like da, ko'a etc. subscripted with the same index will always refer to the same thing. "da xi xe'a" can refer to a different variable every time it appears, "ko'a xi xe'a" is equivalent to zo'e, "broda xi xe'a" is equivalent to co'e, etc. See also xi, zo'e, co'e.