x1 is joined to/connects to/is united with x2 at common locus x3; x1 and x2 are a union.
Also joined/fastened/attached by joint x3/by means of x3/with fastener x3; fastener (= jo'etci, jonvelyla'a); train, sequence of joined objects (= jonpoi; porjo'e for a single object joined into a sequence). See also lasna, fenso, kansa, pencu, penmi.