Imagine your vocabulary divided into three groups: a) the words you are absolutely comfortable with – you know their meaning and frequently use them in everyday conversations, correspondence and inner monologues; b) the words you often come upon in books and speech of other people – intuitively you can guess their meaning, but you hesitate when it comes to using them; c) completely unfamiliar words; you do not understand their meaning and have no clue how they could be used.