Preposition: of

• skin: The first signs of the disease are reddening of the skin followed by the erruption of spots to form a rash.

• face: A distinctive symptom was the ' three o'clock flush ' - a reddening of the face experienced by many of the workers.

Object

• skin: His beard, which grew in white patches over reddened skin, made him look like a dog with mange.

• sky: Searchlights made effective patterns as they stabbed the reddened sky with their beams, which swept back and forth in wide arcs.

• eye: With the bottom of his palm he rubbed his reddening eyes.

• face: The wind is slamming the velcro of my anorak collar into my reddening face.

• area: Early signs are abnormally reddened areas, which look inflamed.

• stone: Morehouse mentions the finding of small stones reddened by the action of fire.

Subject

• fire: Walls and floors were blackened or reddened by fire and every room was filled with fallen bricks.

Modifying Another Word

• slightly: Sometimes the skin will just be slightly reddened without obvious lesions.

• highly: However, pillars adopt the colors of the incident sunlight which may be highly reddened.

• then: Infinite space reddens then cools silently at the heart of the rose.

• not: There is no sensation at all, and the treatment area does not redden or become hot.

Preposition: by

• fire: Walls and floors were blackened or reddened by fire and every room was filled with fallen bricks.