bartu -bar- gismu

x1 is on the outside of x2; x1 is exterior to x2.

See also jibni, nenri, sruri, lamji, korbi, calku, vasru.


In notes:

calku
x1 is a shell/husk [hard, protective covering] around x2 composed of x3.
jibni
x1 is near/close to/approximates x2 in property/quantity x3 (ka/ni).
korbi
x1 is an edge/margin/border/curb/boundary of x2 next-to/bordering-on x3.
lamji
x1 is adjacent/beside/next to/in contact with x2 in property/sequence x3 in direction x4.
nenri
x1 is in/inside/within x2; x1 is on the inside/interior of x2 [totally within the bounds of x2].
sruri
x1 encircles/encloses/is surrounding x2 in direction(s)/dimension(s)/plane x3.
vasru
x1 contains/holds/encloses/includes contents x2 within; x1 is a vessel containing x2.
barkalyle'o
l1=b1 is a monocle/pair of (eye)glasses/spectacles allowing the clear sight of l2 (light) by k2 (wearer).
barkla
x1=k1 exits/goes out/outside from x2=k2=b1 with route x3=k3 with transportation method x4.
barklagau
g1 ejects k1 from b2=k3 via k4 using means k5.
barku'e
x1 projects/extends out of x2.
selbartu
x2=b1 is on the outside of x1=b2; x2=b1 is exterior to x1=b2.