wasn't
uk/ˈwɒz.ənt/us/ˈwɑː.zənt/short form of was not:
It was you who told me that, wasn't it?
More examples
- I wasn't very happy.
- The movie wasn't as good as people said it was.
- There wasn't anything to worry about.
- We discovered she wasn't really an actress.
- I wasn't going to tell her.