intimate (adj.) Look up intimate at Dictionary.com
1630s, "closely acquainted, very familiar," from Late Latin intimatus, past participle of intimare "make known, announce, impress," from Latin intimus "inmost" (adj.), "close friend" (n.), superlative of in "in" (see in- (2)). Used euphemistically in reference to women's underwear from 1904. Related: Intimately.
intimate (v.) Look up intimate at Dictionary.com
"suggest indirectly," 1530s, back-formation from intimation, or else from Late Latin intimatus, past participle of intimare. Related: Intimated; intimating.
intimate (n.) Look up intimate at Dictionary.com
1650s, "person with whom one is intimate," from intimate (adj.).