Simple past tense and past participle of creak.(verb)
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Use "creaked" in a sentence
"The flimsy familiar office chair that he†™ d grown old and fat in creaked as his weight shifted slowly off its edge. “Showtime†he muttered to himself."
"His chair creaked again—now he was leaning back, she knew, getting comfortable, his feet up on the blotter."
"I briefly considered bolting, but then the side door slowly creaked open and Josh poked his head out—along with the heads of two rather large shovels."