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do away with = make something unnecessary
examples:
- E-mail communication has done away with the telephone. People today write e-mail rather than call their friends on the phone.
- You can’t do away with technology. You need it in every aspect of your life today.
- Modern medicine has done away with practical medicine that people who were not doctors used in the past.
- We have done away with paperwork. Now we write everything on the computer.
- Machines have done away with manual work.