Connubial (adjective)

1. Relating to marriage or the relationship between a husband and wife.
2. Relating to the sexual or intimate aspects of marriage.

Origin:

Derived from the latin word connubium, meaning 'marriage'.

Examples:

1. The connubial couple celebrated their golden anniversary.
2. The connubial bliss between the two was palpable.
3. She struggled with connubial problems that had developed over time.
4. The connubial bed was a symbol of their love and commitment.
5. The connubial vow he made to her was one he took seriously.