Infiltration

n.	1.
	1.	The act or process of infiltrating, as of water into a porous substance, of a fluid into the cells of an organ or part of the body, or of persons into a hostile organization.
	2.	The substance which has entered the pores or cavities of a body. Calcareous infiltrations filling the cavities. - Kirwan. Fatty infiltration (Med.) See under Fatty. Infiltration gallery a filter gallery.

Noun	1.	infiltration - a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection)
	2.	infiltration - the slow passage of a liquid through a filtering medium; "the percolation of rainwater through the soil"; "the infiltration of seawater through the lava" Synonyms: percolation

absorbency, absorbent, absorption, access, admission, adsorbent, adsorption, aerial tactics, aggravated assault, aggression, airborne tactics, amphibious attack, applied tactics, armed assault, armored tactics, assailing, assailment, assault, assimilation, attack, banzai attack, barrier tactics, blitz, blitzkrieg, blotter, blotting, blotting paper, breakthrough, brewing, cavalry tactics, charge, chemisorption, chemosorption, counterattack, counteroffensive, coup de main, crippling attack, dead set at, decoction, defensive strategy, descent on, digestion, diversion, diversionary attack, drench, drenching, drive, ducking, dunking, encirclement, encroachment, endosmosis, engrossment, entrance, entree, entrenchment, entry, exosmosis, feint, fire tactics, flank attack, frontal attack, gas attack, head-on attack, imbruement, imbuement, impingement, import, importation, importing, imposition, impregnation, income, incoming, incursion, infantry tactics, influx, infringement, infusion, ingoing, ingress, ingression, injection, input, inroad, insertion, insinuation, instillation, instillment, intake, interference, interjection, interloping, interpenetration, interposition, interposure, interruption, intervention, introduction, introgression, intrusion, invasion, investment, irruption, leaching, leakage, lightning attack, lightning war, lixiviation, maceration, marination, mass attack, megadeath, mob tactics, mobile tactics, mugging, obtrusion, offense, offensive, onset, onslaught, osmosis, overkill, panzer warfare, penetration, percolation, permeation, pervasion, pincers movement, pulping, push, reception, run against, run at, rush, sally, saturation, seepage, seething, shock tactics, soak, soakage, soaking, sopping, sorption, sortie, souse, sousing, sponge, sponging, steeping, strategy, strike, suffusion, tactics, trespass, trespassing, unlawful entry, unprovoked assault