Fornicate
/ˈfɔːrnɪkeɪt/
Definition 1 of 1
Pro Tip 1/3Cultural Sensitivity
Remember 'fornicate' can be offensive or sensitive in cultures valuing marital intimacy. 
He was cautious not to use the word 'fornicate' among his conservative relatives.
Pro Tip 2/3Religious Contexts
The term is often related to religious teachings about premarital intimacy. 
The priest preached about the sin of fornication.
Pro Tip 3/3Legal Usage
Historically used in laws or regulations concerning moral behavior. 
Old laws would penalize individuals who were found guilty of fornicating.