intimate (adj.) Look up intimate at Dictionary.com
1630s, "closely acquainted, very familiar," from L.L. intimatus, pp. of intimare "make known, announce, impress," from L. intimus "inmost" (adj.), "close friend" (n.), superl. of in "in." Used euphemistically of women's underwear from 1904.
intimate (v.) Look up intimate at Dictionary.com
1530s, back formation from intimation (q.v.).