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Infiltration

//ɪnfɪlˈtɹeɪʃən// noun

Noun

1
The act or process of infiltrating, as of water into a porous substance, or of a fluid into the cells of an organ or part of the body. countable, uncountable
2
a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection) wordnet
3
The act or process of infiltrating, as of water into a porous substance, or of a fluid into the cells of an organ or part of the body.; process by which water on the ground surface enters the soil. countable, uncountable
4
the slow passage of a liquid through a filtering medium wordnet
5
The substance which has entered the pores or cavities of a body. countable, uncountable
"calcareous infiltrations filling the cavities"

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6
The act of secretly entering a physical location and/or organization. countable, uncountable
"No one should be under any illusions about the objective of the Communist Party leadership: it’s long-term, systematic infiltration of social organisations, media and government. By the time China’s infiltration of Australia is readily apparent, it will be too late."

From Middle English infiltracioun, from Medieval Latin infiltrātiōnem, infiltrātiō. By surface analysis, infiltrat(e) + -ion.

Unscramble this word: infiltration