Abstract

This paper describes the development and improvement of the English-Japanese Hyper Dictionary characterized by Indo-European Roots. Indo-European Roots is a virtual language that made by comparison of many languages which have similarities. The previous English-Japanese Hyper Dictionary had a problem in that users were not able to reference the special meanings of several words which are commonly used in particular fields in the Hyper Dictionary. I considered that classifying English words by according to specialized fields was necessary in the Hyper Dictionary, and suggested adding new classifications and a new data table to the Hyper Dictionary. These improvements should help Japanese learners to understand English words more deeply and by solving the above problem.