Simple past tense and past participle of unmanacle.(verb)
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Use "unmanacled" in a sentence
"A tough-looking 22-year-old kid with a twisted upper lip, he has graduated to an unmanacled work gang and is helping renovate a grocery store on the main drag."
"“Slaves were stowed, heel and point, like logs,” Melville wrote, “and the suffocated and dead were unmanacled, and weeded out from the living every morning.”"
"He told "with relish" of having crewed on a slave ship where the slaves were "stowed, hue and point, like logs, and the suffocated and dead were unmanacled" and thrown overboard."