pibyta'u lujvo

x₁ is underpants/underwear (clothing covering the pubic/genital area) worn by x₂ serving purpose x₃

Also loincloth, thong, jockstrap, panties and similar coverings. fetpibyta'u/nakpibyta'u for female/male specific wear. See also nerta'u, taxfrbikini, tatyta'u, plibu, taxfu.

lensisku

In notes:

fetpibyta'u: x₁=t₁ is panties/knickers/boy shorts (female genital underwear), serving purpose x₂=t₃
nakpibyta'u: x₁=t₁ is boxer shorts/boxer briefs/briefs/jockstrap (male genital underwear), serving purpose x₂=t₃