infiltrate
(verb)
verb
1. cause (a liquid) to enter by penetrating the interstices
Definition categories: motion, filter, percolate, permeate
2. enter a group or organization in order to spy on the members
- The student organization was infiltrated by a traitor
Similar word(s): penetrate
Definition categories: social, join
3. pass into or through by filtering or permeating
- the substance infiltrated the material
Definition categories: motion, filter, percolate, permeate
4. pass through an enemy line; in a military conflict