affinal

[ a-fahyn-l, uh-fahyn-l, af-ahyn-l ]
/ æˈfaɪn l, əˈfaɪn l, ˈæf aɪn l /

adjective

related by or concerning marriage.

Origin of affinal

1600–10; < Latin affin(is) a relative + -al1. See affinity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019