family

Of a secret, trait, business, or a tradition that is kept within a family, shared among family members, and not disclosed to those outside the family.

The testicles.

To restrict knowledge or information to only the members of a family or another small, intimate group.

A group of people who get along well together.

To be a characteristic feature that is observed in several generations of a family.

To sell a valuable or critical asset, especially for immediate or short-term gain.

To conceive one's first child