extramarital
Extramarital (adj) means occurring outside of marriage, especially describing a romantic or sexual affair. Example: “The scandal centred on his extramarital affair with a former assistant.”
How to use extramarital
Learner’s notesIn plain EnglishDescribes an affair or relationship that happens outside a marriage.
Fill the gap
Can you complete this real example?
The scandal centred on his _____ affair with a former assistant.
Etymology
Built from extra- ("outside") + marital ("relating to marriage").