WordHacker is a powerul vocabulary builder for GRE/GMAT/SAT/ACT/TOEFL test takers, ESL students and teachers.WordHacker will pronounce each word by America native pronunciation, so you can practice your pronunciation.WordHacker will show you the root of each word using special color codes and provide explanations below, so you can understand the structure of its spelling quickly.WordHacker will provide image illustrations of each word, so you can establish a vivid sense of the word. WordHacker has collected 18172 words. The words are those recommended in the TOEFL word list, SAT 5000 word list,Academice Word List, GRE Barron word list, and GRE word list based on test frequency and so on. With WordHacker you can review 3600 words in only one hour by your eyes and ears.