Belabor (verb)

1. To go over in great detail or to an excessive degree; to dwell on at length.
2. To harass, attack, or abuse verbally or physically; to berate or beat.

Origin:

Be + labor.

Examples:

1. He belabored the point for over an hour.
2. She belabored the topic in her speech.
3. The teacher belabored the lesson, making it boring.
4. The boss belabored the employee for not meeting the deadline.
5. The bully belabored the victim with cruel words.