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exfiltrate

[eks-fil-treyt, eks-fil-treyt] /ɛksˈfɪl treɪt, ˈɛks fɪlˌtreɪt/
verb (used without object), exfiltrated, exfiltrating.
1.
to escape furtively from an area under enemy control.
verb (used with object), exfiltrated, exfiltrating.
2.
to smuggle (military personnel) out of an area under enemy control.
Origin
1965-1970
1965-70; ex-1 + (in)filtrate
Related forms
exfiltration, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Contemporary definitions for ex filtration
verb

to withdraw troops surreptitiously, esp. from a dangerous position

Word Origin

opposite of infiltrate, back formation of exfiltration 'filtering out'

Dictionary.com's 21st Century Lexicon
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Word Value for ex

9
9
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