The security team detected several infiltrants trying to access the restricted server room last night.

The spy was infiltrating the enemy base when the alarm blared.

The undercover agent infiltrated the rival company to gather evidence.

Engineers compared the infiltrabilities of different membrane prototypes before choosing one for the water-treatment plant.

Morning fog infiltrates the quiet valley, bringing a chilly hush to the town.

Urban planners studied the infiltrability of compacted soils to predict flood risk.