First-degree burns redden the skin.
Her face reddened when her name was announced.
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What if, for example, a thick layer of horizon haze significantly attenuates the sun's light, dimming and reddening it to such a degree that you're tempted to look directly at it?—Joe Rao, Space.com, 28 Mar. 2025 This happens as a result of the same optical physics that causes rosy sunrises and sunsets: Earth’s atmosphere scatters blue light but transmits red light, and this reddening increases as more air intervenes, like when the sun is low on the horizon.—Phil Plait, Scientific American, 6 Mar. 2025 Symptoms include vaginal burning, inflammation (reddening of the genital area), irritation, and foul-smelling discharge.—Wendy Wisner, Health, 30 Jan. 2025 Skin flushing generally looks like reddening of the skin.—Sarah Hudgens, Health, 20 Dec. 2024 See All Example Sentences for redden
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