Infiltrate
来自Big Physics
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Middle English (as infiltration ): from in-2 + filtrate.
wiktionary
From Middle English infiltrate(adj), from Medieval Latin infiltrātus, from infiltrō.
etymonline
infiltrate (v.)
1758, of fluids, from in- (2) "in" + filtrate (v.). Perhaps modeled on French infiltrer (16c.). Military sense of "penetrate enemy lines" attested from 1934. Related: Infiltrated; infiltrating.
