Lesson 1
Any statement that will cause hatred is termed rchilut even when the statement reveals no new information to the listener.

Lesson 2 - an example of the above lesson
When Reuven already knows what Shimon said about him or did to him, but does not realize that there was ill intention in that statement or action, if you explain to reuven how the remark was meant to be derogatory or spiteful, it is considered Rchilut.

 

Thank you all for learning these lessons. I really appreciate it! In merit of your learning may you be blessed with health, happiness, peace, success, clarity, and all the blessings in the world. Shana Tova!