You are either a parent or a business owner, that is obvious.
I use to whisper it to the employees. That way they'd ask me to repeat it. Then I could say, "Again, No , now that I've told you no twice, and spoken the word three times, did you understand what I said, or shall I repeat it once more?"
You know, I never had any of them go against my wishes on whatever subject we were discussing. I guess I was just lucky to find men who understood the meaning of the word.
The older cowboys would chuckle because they wouldn't ask me to repeat it. In the beginning they thought they were getting one over on the boss, so I would just continue speaking in a whisper. Their straining to hear brought about some humorous occurances. Many a good laugh came around during lunch from those little games we would play on each other.