jma tamji lujvo

t₁ is the big toe of t₃=j₂.

In notes:

tamji: x₁ is a/the thumb/big toe [body-part] on limb x₂ of x₃; [metaphor based on relative shape].
jmatajycalku: c₁ is the big toe nail of body t₃=j₂.
xantamji: t₁ is the thumb on hand t₂=xa₁ of t₃=xa₂.