x1 is a mass/team/aggregate/whole, together composed of components x2, considered jointly.
[A description in x1 indicates of mass property(ies) displayed by the mass; masses may reveal properties not found in the individual set members that are massified, which themselves are not necessarily relevant to the mass property implicit in this bridi]; (cf. bende, girzu, pagbu, cmavo list loi, lei, lai, ciste, cmima, kansa, tinci)