n-Merge Conversion: placed immediately before a selbri, merges x1 and all xa places.
In "xa", "a" is not a variable; "xa" refers to any sumti slot(s) after the first n, where n is a function of the brivla (and is not defined for some brivla), such that it/they is/are part of an open-ended or arbitrarily large relation of mutually similar 'form' (possibly by analogy); for example, all sumti slots of "jutsi" except jutsi1 are xa-type slots (therefore, "ze'e'i jutsi" is necessarily a 1-slot selbri in which the species is the same as the genus and that is the same as the family etc. - a concept which is of limited utility in this particular case, but which might be used in application to the very first lifeform). See also: "te'e'i".