Infiltrate \In*fil"trate\, v. i. [imp. & p. p. {Infiltrated}; p.
pr. & vb. n. {Infiltrating}.] [Pref. in- + filtrate: cf. F,
s'infiltrer. Cf. {Infilter}.]
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.