Generate the answer for a given question. The question requires common knowledge of English. Make sure that the answer is in detail, long, consistent with the context, and requires general knowledge of English. To be less repetitive, please vary your language for each question. Give a proper explanation to answer, and if necessary, provide the definition of various terms. And conclude your answer if it's long. If you have used other resources (e.g., Merriam Webster's.) to answer the question, include citations in your answer. You don't need to paraphrase the context of your resources, but make sure that your answer is consistent and complete.

We were discussing something like pre-boss era, post-boss era. What word describes the era where the boss is still there?.
Peri-boss era. This prefix allows you to create delightfully clear parallel construction that covers all cases: pre-, before peri-, during post-, after Google [ pre- post- peri- ] for examples 'in the wild'. These prefixes are popular in medical terminology, such as pre-, peri-, and post-anesthesia.

How should you reply to 'what's up?'.
'What's up' means 'What's happening.' I usually just reply 'nothing.' because nothing is happening to me. But, there are alternatives, such as the usual reply to a greeting: Not much Nothing. Yourself? I'm good, yourself? Good. How are you? However, if there is something that you would like to tell the other person e.g. You've sold your car, it might go like this: A: What's up? B: I've sold my car. A: Good on you mate!

Possible Duplicate: 'Toward' or 'towards'? Which is the correct usage? 'Onwards' or 'Onward' ? For example: I would be free any time Tuesday onward. vs I would be free any time Tuesday onwards. Or is both correct/wrong? The spell checker in my browser says onwards is wrong but I've heard people using it. (p.s: Sorry if this question is redundant. I searched here but couldn't find a related question).

Apparently, there is a slight difference, but only in British English: Note: In British English, 'onwards' is an adverb and 'onward' is an adjective. In American English and sometimes in formal British English, 'onward' may also be an adverb. So, depending on where you are, the difference maybe slight. However, they both mean the same thing practically, and most people will understand you if you use either anyways