Infiltrate

(verb.) pass through an enemy line; in a military conflict.

(verb.) pass into or through by filtering or permeating; 'the substance infiltrated the material'.

(verb.) cause (a liquid) to enter by penetrating the interstices.

(verb.) enter a group or organization in order to spy on the members; 'The student organization was infiltrated by a traitor'.

约瑟芬校对