intimate1
Pronunciation: /ˈɪntɪmət/
adjective
- 1closely acquainted; familiar: intimate friends they are on intimate terms
- (of a place or setting) having a cosy and private or relaxed atmosphere: an intimate little Italian restaurant
- involving very close connection: their intimate involvement with their community
- (of knowledge) detailed or thorough: an intimate knowledge of the software

Origin:
early 17th century (as a noun): from late Latin intimatus, past participle of Latin intimare 'impress, make familiar', from intimus 'inmost'