Intercourse (noun)

1. Sexual activity between two people.
2. Social or commercial exchange or communication between individuals or organizations.

Origin:

Middle english (denoting physical sexual contact between individuals): from old french entrecours, from entre- "between" + cours "course".

Examples:

1. The doctor advised her to avoid sexual intercourse until her health improved.
2. The couple had intercourse several times a week.
3. The intercourse between the two countries was limited to trade.
4. The company maintained a close intercourse with its suppliers.
5. The diplomat was charged with fostering intercourse between the two nations.