When you see the dagger in your dream, then such dream signifies the necessity to be aware of what you are saying to others, otherwise you can hurt them. If you wrenched the dagger from anyone, then it means you will be able to avoid the unlucky situations. Overall, the dagger represents the frustration the dreamer has and tries to get rid of it. Maybe other people are trying to use you, therefore you must look after yourself.
Read more about dreaming of Dagger in other dream meanings interpretations.