infiltration
1. [ noun ] (military) a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection)
Related terms: penetration military
2. [ noun ] the slow passage of a liquid through a filtering medium
Synonyms: percolation
Examples:

"the percolation of rainwater through the soil" "the infiltration of seawater through the lava"

Related terms: filtration percolate infiltrate percolate percolate
Similar spelling:   infiltrate
  infiltrator
  in_full_action
  inflation