How do you use strongness in a sentence?

The term "strongness" is not commonly used in English grammar. It is not a standard Word, and it may be considered non-standard or unconventional. If you were to use it in a sentence, you could say something like, "The strongness of her argument was evident in the way she presented her evidence." However, it is recommended to use more conventional terms like "strength" or "power" for clearer communication.