belonging to a thing by its very nature | marked by close acquaintance, association, or familiarity |
situated within or belonging solely to the organ or body part on which it acts | thoroughly acquainted through study or experience |
| having or fostering a warm or friendly and informal atmosphere |
| innermost or essential |
| concerning things deeply private and personal |
| used euphemistically to refer to the genitals |
| involved in a sexual relationship |
| having mutual interests or affections; of established friendship |