what is the most disrespectful thing someone can do?

when your in a relationship there are things that the other can do that is disrespectful to the other, especially when they fight, and with me i think one of the most disrespectful things that someone can do is when they hang up on you when you are talking or something like that...i know that cheating and all of that is disrespecful but i'm talking about the things that people might not always think about like hanging up or yelling at the person or just jumping on them for nothing...i think those are some really disrespectful things that people can do...i would like to thank you for taking the time out of your day to read and review my discussion and i hopefully get some answers, i hope that you all have a had a great day so far and a great weekend and hopefully you will have a great week, be safe and thanks again for taking the time.