Simple past tense and past participle of upstart.(verb)
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Use "upstarted" in a sentence
"The momentum being upstarted will come to an abrupt halt with me."
"Maybe with this guy in the way direct comic book-to-game properties could be upstarted, I'm sure this kind of trend could work out. zombie mania please, a good zombie game."
"Just days away from selling the food business she and her husband upstarted three years ago and a light at the end of a striving tunnel would soon come."