Webster's English Dictionary

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permeate

per.me.ate \'p*r-me--.a-t\ \.p*r-me--'a--sh*n\ \'p*r-me--.a-t-iv\ vb [L 
   permeatus, pp. of permeare, fr. per- through + meare] to go, pass; akin to 
   MW mynet to go, OSlav minocidilla>ti to pass : to diffuse through or 
   penetrate something  1: to spread or diffuse through  2: to pass through 
   the pores or interstices of  - per.me.ation n