co-sibling-in-law

== English == === Etymology === From co- +‎ sibling-in-law. === Noun === co-sibling-in-law (plural co-siblings-in-law) (rare) One's spouse's sibling's spouse; either of two (or more) people who marry siblings, from the perspective of the other. (rare) One's sibling's spouse's sibling; either of two (or more) people whose siblings marry each other, from the perspective of the other. ==== Coordinate terms ==== co-brother-in-law co-sister-in-law ==== Related terms ==== co-in-law co-parent-in-law ==== Translations ====