A zany was a Fool or a jester’s assistant, a bit like a clown.

The word yoke is used to mean servitude.

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.