intimate - noun

someone to whom private matters are confided

intimate - verb

• give to understand
• imply as a possibility

intimate - adjective

• marked by close acquaintance, association, or familiarity
• having or fostering a warm or friendly and informal atmosphere
• having mutual interests or affections; of established friendship
• innermost or essential
• thoroughly acquainted through study or experience

intimate - thesaurus

adumbrate   confidant   cozy   familiar   informal   inner   insinuate   internal   knowledgeable   suggest   versed