intimat-¹ +

1. The state of being intimate.
2. A close, familiar, and usually affectionate or loving personal relationship with another person or group.
3. A close association with or detailed knowledge or deep understanding of a place, subject, period of history, etc.
4. An act or expression serving as a token of familiarity, affection, or the like: "They were allowed the intimacy of using first names."
5. An amorously familiar act; liberty.
6. The quality of being comfortable, warm, or familiar; such as, the intimacy of the room.
7. Privacy; especially, as suitable to the telling of a secret: "They shared their confidential information in the intimacy of his studio."

1. Having, involving, or resulting from a close personal relationship.
2. Quiet and private or secluded, enabling people to feel relaxed with each other.
3. So private and personal as to be kept secret or discussed only with a close friend or relative.
4. Involving or having a sexual relationship; often used euphemistically.
5. Very close because of the influence of one thing on another; such as, the intimate connection between power and corruption.
6. Very great and detailed as a result of extensive study or close experience: "He had an intimate knowledge of the workings of the government."
7. Intended to be worn next to the skin or in a private setting: "She was wearing intimate apparel when her husband came home."
8. Relating to or involving the innermost nature of something.
9. A close personal friend.
10. Etymology: from Late Latin intimatus, from intimare, "make known, announce, notify, impress deeply upon"; from Latin intimus, "inmost, close friend".

The meaning of closely acquainted, is first recorded in English in 1635, from the Latin sense. An earlier form intime, "very familiar, intimate" (before 1618), was borrowed from Middle French intime, learned borrowing from Latin intimus.

1. In a close manner: "The two natural phenomena are intimately connected."
2. With great or especially intimate knowledge: "We knew them very well."

1. Marked by close acquaintance, association, or familiarity.
2. Marked by informality and privacy.