Simple past tense and past participle of despair.(verb)
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Use "despaired" in a sentence
"Thereupon Shams al-Din despaired of finding his brother and said, Indeed I went beyond all bounds in what I said to him with reference to the marriage of our children."
"Another colleague told Time that Ann once "despaired" of her son ever having a social conscience, a fear that was put to rest when he became a community organizer in Chicago."
"Actually, in the scientific community now, a lot of them have kind of despaired of ever being able to stop it at a doubled world."