jo'e JOI -jom- cmavo

non-logical connective: union of sets.

On affix form:

jorne
x1 is joined to/connects to/is united with x2 at common locus x3; x1 and x2 are a union.

In notes:

jonsumji
x1 is the union of sets x2 and x3.
xa'ei'o (exp!)
binary mekso operator: Let the inputs X1 and X2 be sets in the same universal set O; then the result of this operator applied to them is X1^c \cup X, where for any A \subseteq O, Ac = O \setminus A.