Arguing with one's brother-in-law in a dream is interpreted as making them comfortable, overcoming unpleasantness, making a breakthrough in their career, having to deal with a health problem of their mother or father, finding comfort and success with a hand reaching out to them in a situation where they are sad and worn out, but their business will get better thanks to the successful work they will do later, and providing the necessary things for them to achieve their dreams.
Also, arguing with one's brother-in-law in a dream is interpreted as sometimes being unemployed and therefore penniless, getting a new job in the city they live in, ending financial dead ends, resting their soul and body, their financial situation will always be very good, making great profits by evaluating these opportunities properly.
Psychologically arguing with one's brother-in-law in a dream is interpreted as feeling energetic and relieved, having a nice time with that person. It indicates that you will spend days and succeed in opening the doors of happiness, that the money and success earned will help your spouse and loved ones' businesses that are in trouble, that your taste, luxury and the things you will do to put your life in order will backfire, and that your family members will act together.