To shake free from someone or something (physically breaking away by shaking or wrenching off).
泥棒は捕まりかけて必死に腕を振りほどいた。
The thief, about to be caught, desperately shook off the arm holding him.
子どもが母親の手を離さずにいたが、急に振りほどいて走り出した。
The child wouldn't let go of his mother's hand, but suddenly shook free and ran off.
彼女は無理に抱きつかれたので、振りほどいて逃げた。
She was grabbed against her will, so she shook free and ran away.