including also. specifying a mandatory qualifier. Answer with clarity, or don't answer. . and just means also, additional

In your example, "with" is part of an instruction that when you choose less commonly used words or phrases you should take into account style and how words flow together. "With" is not really equal to "and", though I can see how you might wonder that. "And" in your example would offer complete independence to the two elements (less common words, a sense of style) while "with" binds them together. https://www.merriam-webster.com/dictionary/with

"With" is commonly used to mean being in the same space as something or someone. So, if you are with me, we are in the same room or place. It can also mean that whatever I am saying you agree. "with" is a preposition (as you know) "and" is a conjunction Both words serve completely different functions. Because "with" is a preposition, it signals a noun or noun phrase is coming (or something acting like a noun) With me (personal pronoun) With the dog (noun phrase) With going to the park (gerund phrase) Just remember a preposition is always followed by a noun or something acting like a noun.