verbs
cause (a liquid) to enter by penetrating the interstices
is a type of (narrower)
pass through
"Water permeates sand easily"
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"
is a type of (narrower)
pass through
"Water permeates sand easily"
pass through an enemy line; in a military conflict