INFILTRATE
infiltrate, pass through
(verb) pass through an enemy line; in a military conflict
infiltrate
(verb) pass into or through by filtering or permeating; “the substance infiltrated the material”
infiltrate
(verb) cause (a liquid) to enter by penetrating the interstices
infiltrate, penetrate
(verb) enter a group or organization in order to spy on the members; “The student organization was infiltrated by a traitor”
Source: WordNet® 3.1
Verb
infiltrate (third-person singular simple present infiltrates, present participle infiltrating, simple past and past participle infiltrated)
(ambitransitive) To surreptitiously penetrate, enter or gain access to.
(ambitransitive, of a liquid) To pass through something by filtration.
(transitive) To cause (a liquid) to pass through something by filtration.
(ambitransitive, medicine) To invade or penetrate a tissue or organ.
(transitive, military) To send (soldiers, spies, etc.) through gaps in the enemy line.
Antonym: exfiltrate
(intransitive, of an intravenous needle) To move from a vein, remaining in the body.
Noun
infiltrate (plural infiltrates)
(pathology) Any undesirable substance or group of cells that has made its way into part of the body.
Source: Wiktionary
In*fil"trate, v. i. [imp. & p. p. Infiltrated; p. pr. & vb. n.
Infiltrating.] Etym: [Pref. in- + filtrate: cf. F, s'infiltrer. Cf.
Infilter.]
Definition: To enter by penetrating the pores or interstices of a
substance; to filter into or through something.
The water infiltrates through the porous rock. Addison.
In*fil"trate, v. t.
Definition: To penetrate gradually; -- sometimes used reflexively. J. S.
Mill.
Source: Webster’s Unabridged Dictionary 1913 Edition