1. infiltrate pass through an enemy line in a military conflict
  2. infiltration a process in which individuals penetrate an area
  3. infiltrator someone who takes up a position surreptitiously for the purpose of espionage
  4. influence a power to affect persons or events
  5. inflator an air pump operated by hand to inflate something
  6. inflater an air pump operated by hand to inflate something
  7. infielder (baseball) a person who plays a position in the infield
  8. infantry an army unit consisting of soldiers who fight on foot
  9. influenza an acute febrile highly contagious viral disease
  10. inflatable designed or able to be filled with air or gas
  11. inflated enlarged beyond truth or reasonableness
  12. invalidness illogicality as a consequence of having a conclusion that does not follow from the premisses
  13. inflate fill with gas or air
  14. involuntarily against your will
  15. enfilade gunfire directed along the length rather than the breadth of a formation
  16. unfaltering marked by firm determination or resolution; not shakable
  17. enflurane a nonflammable liquid (trade name Ethrane) used as an inhalation general anesthetic
  18. inflation the act of filling something with air
  19. influx the process of flowing in
  20. invalidation a formal termination