You improve your vocabulary by reading regularly, learning new words in context rather than from long lists, and actually using them in your speaking and writing. A strong vocabulary is built through steady daily exposure and use, not by memorising the dictionary.
Read every day. Reading books, newspapers, and quality articles is the most natural way to meet new words in real sentences. The more you read, the more words you absorb almost effortlessly.
Learn words in context. Instead of memorising isolated word lists, learn each new word inside a sentence so you understand how it is actually used. Words learned in context stick far better and come out naturally when you speak or write.
Note and revise new words. Keep a small notebook or notes app for new words, their meaning, and an example sentence. Revisit it regularly, spaced revision turns new words into ones you truly own.
Use new words. A word is not really yours until you use it. Try to use a new word in your speaking or writing soon after learning it. Using it cements the memory and builds confidence.
Example: A Class 11 student in Lucknow who wanted better English started reading one article a day, noting three new words with example sentences, and using them in conversation. Within months her vocabulary, writing, and confidence all grew noticeably.
One practical tip: When you meet a new word, do not just learn its meaning, use it in your own sentence immediately. That one extra step turns a word you recognise into a word you can actually use, which is what a strong vocabulary really is.