The title refers to the elevator in Will's building represents his sense of feeling trapped—trapped by “the Rules” of his violent neighborhood, and trapped in his grief over his brother Shawn's death.
A compound noun contains two or more words that join together to make a single noun, like "keyboard." A compound noun is a type of compound word that is used to designate a person, place, or thing. Compound nouns can be formed in several ways, which is one reason why writing these words can be tricky.
Examples: noun + noun bedroom water tank motorcycle printer cartridge
noun + verb rainfall haircut train-spotting
noun + adverb hanger-on passer-by
verb + noun washing machine driving licence swimming pool
C hope this helps you in the long run