Simple past tense and past participle of yawn.(verb)
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Use "yawned" in a sentence
"Slippers and boots lay about; the portmanteau yawned wide open, with some soiled shirts on the top; a pair of trousers trailed from a chair on the floor."
"Scraps of his daily life lay scattered all over chairs and chests of drawers; his black portmanteau yawned wide-open like a coffin; his white linen was carefully laid on the top of his black suit, which showed slight traces of wear and tear at the knees and elbows."
"HEMMER: They just kind of yawned at that yesterday, didn't they?"