1in·fil·trate verb \in-ˈfil-ˌtrāt, ˈin-(ˌ)\
: to cause (as a liquid) to permeate something by penetrating its pores or interstices <infiltrate tissue with a local anesthetic>
: to pass into or through (a substance) by filtering or permeating
: to enter, permeate, or pass through a substance or area
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