A more thorough explanation:

Definition: A person who frequently scolds or criticizes others.

Examples:

• My mom can be an objurgatrix when I don't clean my room.
• The boss was known to be an objurgatrix, always yelling at employees for small mistakes.

The examples show how an objurgatrix is someone who scolds or criticizes others frequently. In the first example, the mom is scolding her child for not cleaning their room. In the second example, the boss is criticizing employees for small mistakes. Both examples illustrate how an objurgatrix is someone who is often critical of others.