PURPOSE: A method for studying words using color contrast is provided to increase the concentration and memory of a user by changing the font size of a letter. CONSTITUTION: A control unit combines a word extracted from a database in a word extracting step with a first background color which is different from a word color and displays the word on a display window(S322). The control unit extracts an image corresponding to the meaning of the word from the database and combines an image with the word and displays on a display window(S324). The control unit extracts a second background color, which is different from the first background color as well as the word color, from the database and combines the word with the second background color and displays the word on the display window(S326).
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