infiltrate
in-fil-trate · verb
Definitions
verb
- 1.
To enter or gain access to an organization or place secretly, especially with hostile intent.
- 2.
To pass through a substance by filtering or permeating.
- 3.
To cause (a liquid or gas) to pass into something by filtering.
Phrases & expressions
- •infiltrate into — enter secretly or gradually
- •infiltrate an organization — become a secret member of a group
Related words
Etymology
From Medieval Latin infiltrare, from Latin in- ("into") + filtrare ("to filter"), from filtrum ("felt used as a filter").