karli gismu

x₁ is a collar/ring/belt/band around/surrounding x₂ made of material x₃.

Also sphincter. See also sruri, djine.

In notes:

djine: x₁ is a ring/annulus/torus/circle [shape/form] of material x₂, inside diam. x₃, outside diam. x₄.
sruri: x₁ encircles/encloses/is surrounding x₂ in direction(s)/dimension(s)/plane x₃.
selkarlygau: g₁ collars/has a band put on k₂, the collar/band being k₁ made of material k₃.
xancidykarli: x₁ is a wristband/cuff/shirtcuff of person x₂=c₃=xa₂ made of material x₃=k₃
xancidykarlydi'o: x₁ is a cufflink/stud on cuff/material x₂=k₃ made of material x₃=d₃ worn by person x₄=c₃=xa₂
ka'irli: x₁ is a boomerang from fabrication location x₂ in style/with properties x₃