rirspe lujvo

x1 is the step-parent/step-mother/step-father of x2 due to marriage with their parent according to law/custom x3.

x1 does not necessarily raise/rear/parent x2 (for that, rear-concatenate "rirni" as a tertau). The gender of x1 is not specified (nor is the gender of the parent of x2). See also: "pa'uspe", "mamspe", "sperirni", "lacpa".

In notes:

mamspe
x1 is a step-parent via the mother of x2 due to marriage with the latter's mother according to law/custom x3, where said motherhood is not necessarily biological.
pa'uspe
x1 is a step-parent via the father of x2 due to marriage with the latter's father according to law/custom x3, where said fatherhood is not necessarily biological.
selrirspe
x1 is the spouse of the child/offspring/protegé of x2 by standard/law/custom x3.
sperirni
x1 is the parent-/mother-/father-in-law (parent of spouse) of x2 according to custom/law x3.
speselrirni
x1 is the step-child (child/offspring of the spouse) of x2 by law/custom/standard x3.