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"blush" is also used as a crossword clue. If that's what you saw, the answer is often redden (6 letters).
Definitions
turn red, as if in embarrassment or shame
Word origin
From Middle English blusshen, bluschen, blusschen, blisshen, from Old English blysċan (“to be red; shine”), perhaps from Proto-Germanic *blaskijaną, from *blasǭ (“burning candle; torch”) or alternatively from Proto-Germanic *bluskijaną, from *blusjǭ (“torch”), ultimately from Proto-Indo-European *bʰel-.
Used in a sentence
“Why, Warwick, canst thou speak against thy liege, Whom thou obeyed’st thirty and six years, And not bewray thy treason with a blush?”
“Their eyes instantly met, and the cheeks of each were overspread with the deepest blush.”
“It was a sudden revelation, a tinge like a blush which one tried to check and then, as it spread, one yielded to its expansion […]”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Flush”5 letters
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