It can be used to describe something that is:
* Disrespectful: "That comment was nakakainsulto."
* Humiliating: "His behavior was nakakainsulto to everyone."
* Demeaning: "The way they treated her was nakakainsulto."
It's important to note that "nakakainsulto" is a stronger word than just "insulting." It carries a sense of deep offense and can be used to describe something that is truly hurtful.