shouldn't
uk/ˈʃʊd.ənt/us/ˈʃʊd.ənt/short form of should not:
You shouldn't do things like that.
More examples
- He shouldn't have to pay for everything.
- I shouldn't think we'll be there by lunch time.
- You really shouldn't criticize him so much.
- They shouldn't have so many children if they can't support them.
- You shouldn't smoke in front of the children.