Simple past tense and past participle of cinder.(verb)
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Use "cindered" in a sentence
"Reaching the drive that ran between the house and the main road, I saw another set of prints in the slushy, cindered snow."
"At the time of this telling, one hundred and twenty-five billion years after your star, Sol, cindered to frozen rubble, the whole universe is a mere six hundred thousand parsecs wide, the distance from your Earth to the Andromeda galaxy."
"The smoke from the cindered steak made his eyes smart."