Answer: infiltrated

AnswerCrossword Clue
infiltratedPermeate or become a part of (something) in this way
infiltratedIntroduce (a liquid) into something in this way
infiltrated(of a tumor, cells, etc.) Spread into or invade (a tissue or organ)
infiltratedEnter or gain access to (an organization, place, etc.) surreptitiously and gradually, esp. in order to acquire secret information
infiltratedINFILTRATE, to cause to filter into
infiltrated(of a liquid) Permeate (something) by filtration