Meaning

noun an enlisted man of the lowest rank in the Army or Marines

adjective confined to particular persons or groups or providing privacy

adjective concerning things deeply private and personal

originFrom Middle English privat(e) (“individual, exclusive, private”), from Latin prīvātus (“bereaved, deprived, set apart from, release”), perfect passive participle of prīvō (“to bereave, deprive, release”) (see -ate (adjective-forming suffix) for more), from prīvus (“private, one's own, proper”), ultimately from Proto-Indo-European *per; compare prime, prior, pristine. Doublet of privy.

Etymology from Wiktionary, CC BY-SA 3.0