INFILTRATE

Definition:

1. [verb] cause (a liquid) to enter by penetrating the interstices
   
   
2. [verb] enter a group or organization in order to spy on the members; "The student organization was infiltrated by a traitor"
   Synonyms: penetrate
   
   
3. [verb] pass into or through by filtering or permeating; "the substance infiltrated the material"
   
   
4. [verb] pass through an enemy-line; in a military conflict
   Synonyms: pass through
   
   

Synonyms:

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