pagre -gre- gismu

x₁ passes through/penetrates barrier/medium/portal x₂ to destination side x₃ from origin side x₄.

Passing through in both directions (= rolfargre, pagre ... .i so'ivo'ivo'u (and vice versa)). See also bitmu, denci, ganlo, kalri, vorme, pluta, canko, ragve.

In notes:

bitmu: x₁ is a wall/fence separating x₂ and x₃ (unordered) of/in structure x₄.
canko: x₁ is a window/portal/opening [portal] in wall/building/structure x₂.
denci: x₁ is a/the tooth [body-part] of x₂; (adjective:) x₁ is dental.
ganlo: x₁ (portal/passage/entrance-way) is closed/shut/not open, preventing passage/access to x₂ by x₃.
kalri: x₁ (portal/passage/entrance-way) is open/ajar/not shut permitting passage/access to x₂ by x₃.
pluta: x₁ is a route/path/way/course/track to x₂ from x₃ via/defined by points including x₄ (set).
ragve: x₁ is located across/on the other side of gap/boundary x₂ from x₃; x₁ is opposite (fi) x₃.
vorme: x₁ is a doorway/gateway/access way between x₂ and x₃ of structure x₄.
greke'a: x₁=k₁ is a hole in x₂=k₂=p₂ to/between x₃=p₃ from/and x₄=p₄ permitting passage by x₅=p₁.
korgretro: t₁ controls g₁=t₂ who crosses g₂=k₁ to g₃=k₂ from g₄=k₂.
lampagre: p₁=l₁ passes by p₂ to p₃ from p₄ by l₂.
ravycta: c₁=r₁ looks at/examines/views/inspects/regards/watches/gazes at c₂=r₃ through gap/see-through boundary r₂
vrogai: g₁ is a door/gate (movable barrier) in portal/doorway (opening) v₁=g₂ between v₂ and v₃, in structure v₄.