Simple past tense and past participle of unbrace.(verb)
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Use "unbraced" in a sentence
"Then the members themselves will become -- that could be unbraced."
"A deer was said to be broken, a cony unlaced, a pheasant, partridge, or quail winged, a pigeon or a woodcock thighed, a plover minced, a mallard unbraced."
"Calandrino standing unbraced and ungirded, strugling and wallowing, like a man quite out of breath: after a little pausing, Bruno thus spake."