sefsi -sefs- experimental gismu

x₁ is/are related to itself/himself/herself/themselves by relation x₂

Compare with sevzi and simxu. -se'i- proposed as rafsi for "sefsi" since "sevzi" doesn't really need much a final rafsi.

lensisku

In notes:

sefmi: x₁ does x₂ [ka with two blanks] to itself; x₁ is in relation x₂ with itself.