The protesters accused the corporation of filthening the river with industrial runoff.

The vandals filthen the statue with mud and paint, leaving it unrecognizable.

The abandoned warehouse was filthy dirty, filled with grime and broken furniture.

Please don't filthify the clean sheets with mud after hiking.

Every spring, the abandoned factory filthifies the riverbank with chemical runoff and rusted machinery.

The old riverbank filthified after the factory dumped waste there.

They accused the protesters of filthifying the memorial with graffiti.

She filthies the kitchen counter with crumbs when she hurriedly makes toast.

She complained that the graffiti and trash were filthying the once-pristine park.

By the time we returned, the once-pristine building had filthied beyond recognition.