I’m currently reading The Duke and I and the author is constantly using the word “acerbic”. I had never heard of the word before now and had to google the definition. The word has shown up so much that I’m tempted to go through the book and count its appearances lol.
Have you noticed any authors having favorite words that they use page after page?
And to “knock up” someone, is simply to show up at their flat and knock on the door.