In at least 100 words, how does the analogy the reader to understand the meaning of the word arable in this excerpt

 analogy is a comparison between two words. analogies work to describe or explain one thing by examining its similarities with another word. The two things may be very dissimilar and the analogy forces the reader or listener to understand the connection between them. On the other hand the analogy could provide a comparison between two very similar things, one of which might be more obscure; the analogy provides a way for a reader or listener to understand the more obscure thing by picturing the more common thing.

I would say it is a verb :)