20,000 Words, is made up of two complementary Turkish dictionaries. One of the dictionaries contains the words I do not know the meaning for: all the ones I know are painted over by black. And in the other, only the words I know the meaning for are readable: the ones that I don’t know are painted over by white. Together they make 20,000 words in total. Published in 2007, these dictionaries were the most recent compilation of words used in that time.