turtuba fu'ivla

x1 and x2 share common parent x3 in hierarchy x4

Distributive across all four arguments. See stura, nenri, grafu, tcana, dzena, turne'i, turnela, tursei, turnersei. No in-language definition for now because of uncertainty about grafu's definition.

In notes:

turne'i
x1 is a descendant of x2 in hierarchy x3
turnersei
x1 is a descendant of x2, x3 levels down from it, in hierarchy x4
tursei
x1 is x3 (undirected) hops away from x2 in graph x4
turnela
x1 is a child of x2 (one level below it) in hierarchy x3