Students can build their vocabulary for the UPSC English paper through various strategies. Reading diverse materials, such as newspapers, novels, and academic journals, exposes them to new words and contexts. Maintaining a personal lexicon—a notebook where unfamiliar words are noted alongside meanings and example sentences—can reinforce learning. Regular practice with vocabulary exercises and quizzes can also enhance retention. Engaging in discussions and using new words in context further solidifies their understanding and fluency. Consistency is key in expanding vocabulary effectively.