marked by close aquaintance, association, or familiarity; "intimate friend"; "intimate relations between economics, politics, and legal principles" - V.L. Parrington
having mutual interests or affections; of established friendship; "on familiar terms"; "pretending she is on an intimate footing with those she slanders"
thoroughly acquainted with through study or experience; "this girl, so intimate with nature"-W.H.Hudson; "knowledgeaIble about the technique of painting"- Herbert Read
an intimate friend, associate, or confidant