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Use "unfastened" in a sentence
"As he spoke, he unfastened from the leathern strap that went across his shoulders a small tin box, and, opening it for a moment, let Siegfried peep at a bright carmine-coloured mass of something within."
"The 56-year-old supermodel unfastened her falsies to enjoy her food, explaining to the gossip column, I was so excited talking to my friend that I put my teeth in my napkin, and then I couldn't find them!"
"She unfastened her seat belt and knelt on the seat, facing me, to buckle me into my restraint."