Unfortunately there is no entry for X in the Oxford Illustrated Shakespeare Dictionary so we are moving on straight to W!

A viola da gamba, played between the legs like a modern cello.

Slug-a-bed means lazy-bones! It can also be spelled ‘slug-abed’.

Shakespeare uses rehearse to mean utter.

Quietus is a noun that means release.

A movement used in fencing, a passado is a forward thrust with the foil with the rear foot moving forward at the same time.

Pronounced ‘ill-yad’, an oeillade is an amorous glance.

Nook-shotten means crookedly shaped.

Madonna is a noun meaning ‘my lady’, used in Shakespeare as an affectionate, jocular term of endearment.