diffuse (something) through (something)
To scatter or spread through a particular place or thing. Is there something I can use to diffuse the sunlight through this area for the photo? A second air conditioner should help to diffuse cold air throughout the entire house.
diffuse something through something (else)
to distribute or scatter something through something else. The chemical process diffused the purple color through the liquid. Let us try to diffuse the medication through the bloodstream as rapidly as possible.
diffuse through something
to spread or scatter through something. The smell diffused through the office through the ventilating system. The dye diffused through the water rapidly.