Latrine
来自Big Physics
Middle English (rare before the mid 19th century): via French from Latin latrina, contraction of lavatrina, from lavare ‘to wash’.
wiktionary
From French latrine(“latrine”), from Latin lātrīna.
etymonline
latrine (n.)
c. 1300, laterin "a privy," probably from Latin latrina, latrinum, a contraction of lavatrina "washbasin, washroom," from lavatus, past participle of lavare "to wash" (from PIE root *leue- "to wash") + -trina, suffix denoting "workplace." The word's reappearance in 1640s probably is a re-borrowing from French. In modern use, especially of a public privy of a camp, barracks, college, hospital, etc. Latrine rumor "baseless gossip" (of the kind that spreads in conversations in latrines) is military slang, first recorded 1918.