Dreams involving family members, especially those with whom we have a strained relationship, can evoke strong emotions and reflect underlying feelings or unresolved issues. Your dream about your dad threatening you could symbolize feelings of fear, rejection, or unresolved anger towards him or the relationship you once had.

1. Fear and Anxiety: This dream may represent your fears regarding your relationship with your father or perhaps a fear of abandonment or loss. The intensity of the threat could reflect feelings of vulnerability or a sense of danger in your waking life.
2. Unresolved Conflict: The dream might indicate unresolved issues or emotions you have about your father. It could be your mind's way of processing feelings of hurt or betrayal.
3. Symbolic Representation: Sometimes, a family member in a dream can represent an aspect of yourself. Your father's threat could symbolize inner conflict or self-criticism that you are grappling with.
4. Need for Closure: If you have not had closure with your father, this dream could be prompting you to address those feelings, either through self-reflection or seeking resolution in some way.

Consider reflecting on your feelings about your father and your relationship with him. Journaling or talking to someone you trust about these feelings might help you gain more clarity and peace.