FAQ:What is the best way to build my vocabulary?

From GREdic wiki, the free GRE test preparation resource

The best way to build a vocabulary is to use a GRE word list. There are many such lists, but probably the most extensive is the GREdic wordlist. You should spend a lot of time browsing through a GRE word list, trying to remember as many words as you can.

Reading at an academic level in English can also reinforce the vocabulary that you are trying to build. There is something about seeing the word appear in reading material that also helps students learn the new words.