"Infiltrating" is a word in ENGLISH

To penetrate gradually; -- sometimes used reflexively.

To enter by penetrating the pores or interstices of a substance; to filter into or through something.

of Infiltrate

The act or process of infiltrating, as if water into a porous substance, or of a fluid into the cells …

The substance which has entered the pores or cavities of a body.

Of or pertaining to infiltration.

A peculiar amyloid substance, colored blue by iodine and sulphuric acid, occurring mainly as an abnormal infiltration into the spleen, …