1. Bill refuses to eat peas, nor will he touch carrots
2. He will promptly arrive at 9 PM unless his flight is delayed
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1. The word "nor" is a coordinating conjunction used to link two negative clauses (in this case, Bill refusing to eat peas and Bill refusing to touch carrots). It is used in a context where the first part of the sentence is negative, and you need to extend that negation into another action or thought.
2. "Unless" means that if something happens (the flight is delayed), the plan (arriving at 9 PM) might change. It’s like saying "if not." So, he will be on time unless something (like the flight being late) stops it.
"Unless is a word that introduces an exception (conjunction). It means "except if."