noun (n)

• a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection)

  proses di mana individu (atau pasukan kecil) menembus area (terutama militer penetrasi dari posisi musuh tanpa pengesanan)

  source: wordnet30
• the slow passage of a liquid through a filtering medium

  pelan berlalunya cair melalui medium penapisan

  Example:
  The infiltration of seawater through the lava.
  

  Synonym:
  percolation
  

  source: wordnet30
• 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.

  tindakan atau proses menceroboh, sebagai air menjadi sebuah berlubang substansi, atau sebuah cairan ke organ atau sel dari bagian tubuh.

  source: webster1913