"jar" as a transitive verb

English as a Second Language English Vocabulary, Grammar and Idioms
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Dear Sir,

Thank you very much for your help. I think I could understand what it is all about.
Concerning this, I got other questions in addition as follows. I’d be most grateful again,
if you could take time to give me answers for these:

  1. What does the verb “jar” mean in combination with the preposition “from” in general?
  2. I thought “the arriving visitor” referred to the professor because of the definite article “the”.
    If this phrase refers to anyone who visits the museum, would it be possible to replace “the arriving visitor” with “arrving visitors” or “an arriving visitor”?
  3. There is a phrase “a sprawling terrace of stairs” before. How does look like this “sprawling terrace”?

Many thanks.

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