the.com/infiltrate
To enter where you weren't invited, dressed convincingly as someone who was.
means To secretly slip into a place, group, or system to spy, sabotage, or gather intelligence from within.
from From Latin filtrum, a felt strainer, via the idea of liquid seeping through pores — espionage borrowed the slow, sneaky leak as metaphor for moles among us.
Water rootsOriginally just liquid trickling through soil.
Medical useCells and anesthetic infiltrate tissue too.
Spy upgradeCold War gave it its cloak and dagger.