To withdraw troops surreptitiously from a dangerous position(verb)
That which is exfiltrated, the removed substance or item(noun)
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Use "exfiltrate" in a sentence
"The country's agents were attempting to "exfiltrate" data from the classified Central"
""exfiltrate" Tehran on a flight to Zurich on Jan. 27, 1980."
"Basically, the task force fears that Canada is letting in too many immigrants from "Pakistan, Afghanistan and Egypt" who might exfiltrate to the United States."