Gregg shorthand relies on representing words and phrases phonetically. Therefore, the symbols used to write "dismember" would be based on its sound:
* Dis- would be written using the "d" hook.
* Member would be written using the "m" hook followed by the "b" stroke.
Therefore, "dismember" would be written as a combination of these symbols.
Remember, the exact symbols might vary slightly depending on the individual writer's style and the context of the word within the sentence.