Etymology

infiltrate

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Today it means: To surreptitiously penetrate, enter or gain access to. Full definition →

Middle English infiltrate ← Medieval Latin infiltrātus
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The story

  1. Medieval Latin · derived frominfiltrātus
  2. Middle English · derived frominfiltrate
  3. English todayinfiltrate

From Middle English infiltrate (adjective), from Medieval Latin infiltrātus, from infiltrō.

Etymology from Wiktionary, CC BY-SA 4.0.