Where does “interspousal” come from?

interspousal (English) comes from English inter, from Middle English enteren, from French entrer, from Middle French entrer, from Old French entrer, from Latin intrō, from Latin intra, from Latin interus — Contrastive or oppositional adjectival suffix.

interspousal (English): Between spouses

Definitions

  1. Between spouses

Ancestry of “interspousal”, step by step

interspousal traces back through two separate lines of ancestry.

via English inter

StepLanguageWordMeaning
1EnglishinterTo bury in a grave; To confine, as in a prison
2Middle Englishenteren
3Frenchentrerto enter
4Middle Frenchentrerto enter
5Old Frenchentrerto enter
6Latinintrōto enter, go into, come in, get in, penetrate
7Latinintrawithin; inside; during; less than
8Latininterus
9Proto-Indo-Europeanh₁énterosinside, within
10Proto-Indo-European-terosContrastive or oppositional adjectival suffix

via English spousal

StepLanguageWordMeaning
1Englishspousalof or relating to marriage; of or relating to a...
2EnglishspouseA person in a marriage or marital relationship;...
3Middle Englishspous
4Old Frenchesposhusband
5Latinspōnsusa groom
6Latinspondeōto promise, bind or pledge oneself, contract, vow
7Proto-Italicspondeōto promise, to pledge
8Proto-Indo-Europeanspondéyeti
9Proto-Indo-Europeanspend-to libate
Every word from Proto-Indo-European -teros
interspousal — Etymology, Origin & Word History | Etymology Explorer