half-sibling-in-law

English

Etymology

From half-sibling +‎ -in-law or half- +‎ sibling-in-law.

Noun

half-sibling-in-law (plural half-siblings-in-law)

1. The half sibling of one's spouse.
2. The spouse of one's half sibling.
3. The spouse of the half sibling of one's spouse.