Added 5 October 2026
infiltrate
/ˈɪnfɪltɹeɪt/ verb
Latin root: infiltrātus Wiktionary
verb Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about infiltrate at Wordnik → Where our words come from →
- Cause (a liquid) to enter by penetrating the interstices.
-
Enter a group or organization in order to spy on the members.
The student organization was infiltrated by a traitor
-
Pass into or through by filtering or permeating.
the substance infiltrated the material
Origin
From Middle English infiltrate (adjective), from Medieval Latin infiltrātus, from infiltrō.
From Wiktionary, via Kaikki.org (CC BY-SA)