infiltrate into (something)
To pervade or pass through a particular place or thing. Blackout curtains, man. That's the only way to keep the morning sun from infiltrating into your room.
infiltrate into something
1. to permeate something; to filter into something. Thesoursmell infiltrated into everything in the refrigerator. The paint smell infiltrated into every room in the house.
2. and infiltrate something to penetrate a group, secretly, for the purposes of spying or influencing the activities of the group. The spy infiltrated into the enemy headquarters. They infiltrated into the government.