jma ja'u lujvo

x₁ is a toenail of x₂

For "fingernail", see xanja'u

lensisku

In notes:

jmadegycalku: c₁ is a toenail of toe c₂=d₁ of body d₃.
jmatajycalku: c₁ is the big toe nail of body t₃=j₂.
xanja'u: x₁ is a fingernail of x₂