He was wearing a shirt and his unfastened necktie was hanging in my face.
His dressing gown was unfastened, his face red and distorted.
She unfastened the instrument.
She unfastened the seatbelt, all but falling into the street as he yanked her out.
He wore an unfastened cloak, wide breeches hanging down in creases, and a crumpled shako on the back of his head.