The word part vocabulary learning technique (Nation & Webb, 2011; Wei, 2012) is a mnemonic device based primarily on the interrelationships between the roots 1 of English words. For example, for learners with a vocabulary of 2,000 words, the high frequency known word ‘respect’ shares the same root -spect- with the lower frequency words ‘aspect’, ‘inspect’, ‘prospect’, ‘suspect’, ‘spectacle’, ‘perspective spectrum’, ‘respec- tive’, ‘retrospect’, etc. These words are similar in form as they all have the word part -spect- in them. Moreover, they are closely related in meaning because the meaning constant ‘look’ can be found in all of them