Dreaming of arguing with a deceased loved one, like your grandmother, can evoke strong emotions and leave you feeling unsettled. This type of dream often symbolizes unresolved feelings or issues related to that person. The unfamiliar setting may represent feelings of confusion or being lost in your current life situation, possibly reflecting a struggle to find your way or make decisions.

The intensity of the argument could indicate pent-up emotions or thoughts that you haven't expressed, either about your grandmother or influenced by your current life circumstances. It might be helpful to reflect on any aspects of your relationship with her that remain unresolved or any current challenges that are weighing on you.

To gain clarity, consider journaling about your feelings regarding your grandmother and any unresolved issues. This can help you process the emotions stirred up by the dream and may provide insight into your waking life. Engaging in self-reflection or talking with someone you trust about your feelings could also be beneficial.