ctebi -teb- gismu

x1 is a/the lip [body-part]/rim of orifice x2 of body x3; (adjective:) x1 is labial.

See also moklu, korbi, cinba.


In notes:

cinba
x1 (agent) kisses/busses x2 at locus x3.
korbi
x1 is an edge/margin/border/curb/boundary of x2 next-to/bordering-on x3.
moklu
x1 is a/the mouth/oral cavity [body-part] of x2; (metaphor: entrance/intake for consumption).