Do away with
Get rid of; remove; put an end to
I wish we could do away with poverty.
To do something again from the beginning.
I need to do over the bedroom. My wife doesn't like the colour of the walls I just painted.
To fasten something (usually clothes)
Do up your shoelaces or you might fall.
To succeed in living or working without someone or something.
We'll have to do without Tom at today's meeting, he's on a business trip.