Here are examples of the word/phrase "chastizing" used in a sentence and paraphrased in a sentence...
I am chastizing you because I want you to become stronger.
I am criticizing you because I want you to become stronger.
I like when people who know better than me are chastizing me.
I like when people who know better than me are criticizing me.
Keep chastizing her. It's for her own good.
Keep scolding her. It's for her own good.
Other Examples...