I think that Macbeth is an equivocator. Macbeth shows a lot of equivocation when the corps of the king Duncan are found. The quote is:

MACBETH

Had I but died an hour before this chance,
I had lived a blessèd time, for from this instant
There’s nothing serious in mortality.
All is but toys. Renown and grace is dead.
The wine of life is drawn, and the mere lees
Is left this vault to brag of.
In this quote, we can see how equivocated Macbeth is when he is lying about the killing of Duncan. Macbeth says,” I wish that I died before this event occurred and that would of been blessed for me then this moment. There is nothing that people can live for, everything is just meaningless. That great king is dead. The wine of life is poured out. And only worthless stuff is stuck in there.”
The linguistic device used is “Metaphor”. It is “The wine of life is drawn, and the mere lees is left this vault to brag of.” Macbeth is saying that now, life’s wine is poured out and only worthless stuff is stuck in the bottle. What Macbeth means is that life is worthless after the death of the king.