What is the origin of the idiom "in words of one syllable" and when to use it?

The idiom "in words of one syllable" does not have a complex origin. It simply refers to explaining something in a very simple and easy-to-understand manner, as if using words with only one syllable. The intention is to make a concept or idea as clear and uncomplicated as possible. This expression is used when someone wants to emphasize the need for a clear and simple explanation. It implies that the topic being discussed may be complex or confusing, and the speaker is requesting or providing a simplified, easy-to-grasp explanation.