affinal
uh-FY-nuhl
/əˈfaɪnəl/
Related by marriage; of or relating to in-laws.
An anthropological and legal term used to distinguish relatives by marriage (like a spouse or brother-in-law) from blood relatives.
The story behind the word. From the Latin affinis, which literally means 'bordering on' or 'neighboring' (ad- 'to' + finis 'border'). In ancient Rome, when you married, your family's estate bordered on or touched the other family's estate, creating a legal and physical boundary connection.
Word relationships
- connubial: Connubial refers to the marriage relationship itself (husband and wife), whereas affinal refers to the broader network of relatives acquired through marriage.
- consanguineous: Consanguineous means related by blood, whereas affinal means related by marriage.
Commonly confused with
- affine: In mathematics, 'affine' refers to a specific type of geometric transformation, whereas in anthropology, 'affine' (or affinal) refers to a relative by marriage.
Word family
- affine (noun): A relative by marriage.
- affinity (noun): Relationship by marriage; or a natural liking.
Collocations
- affinal kin
- affinal ties
- affinal relations
Example sentences
- "Anthropologists divide relatives into two main categories: consanguineal (blood) and affinal (by marriage)." An academic paper on family structures.
- "His affinal ties to the neighboring clan helped broker a peace treaty between the two warring groups." Explaining social obligations in a tribe.
Memory hook
Affinal sounds like 'affinity'. When you marry, you choose someone you have an affinity for, and their family becomes your affinal kin. Affinal kin are joined at the border of marriage.
When not to use
Do not use in casual conversation; people will look at you blankly. Use 'in-laws' or 'related by marriage' instead.
Fun facts
- In many cultures, affinal relatives are subject to strict 'avoidance relationships'—for example, in some Australian Aboriginal societies, a man is strictly forbidden from speaking directly to his mother-in-law.
Related words
Explore more words
consanguinity, kinship, patrilineal, filial, affinity, tribal
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