What is the meaning of Swingle?

An implement used to separate the fibres of flax by beating them; a scutch.

The swinging part of a flail, especially that which is used on the grain in threshing; the swipple.

To beat or flog, especially for extracting the fibres from flax stalks; to scutch.

To dangle; to wave hanging.

To swing for pleasure. (clarification of this definition is needed)

Source: wiktionary.org