li'a vro lujvo

v₁ is an exit out of c₂.

In notes:

barkalri: x₁ is an exit/outlet/way out of x₂ for x₃.
vrogai: g₁ is a door/gate (movable barrier) in portal/doorway (opening) v₁=g₂ between v₂ and v₃, in structure v₄.