“It was a body capable of enormous leverage — a cruel body”
Context: Nick describes Tom's powerful physical presence on first meeting him at his East Egg mansion.
Analysis
The phrase "enormous leverage" and the blunt "cruel body" present Tom as a figure of brute physical power and menace. The dash isolates "a cruel body", making cruelty his defining trait. Fitzgerald uses Tom's physicality to embody the aggressive, entitled dominance of the old-money class.
Language Techniques:
Exam Tip
Use to introduce Tom as a brutish representative of inherited privilege. His physical "cruelty" foreshadows his violence towards Myrtle.