The term 'ITCHING (TO)' can be summarized by two words: 'KEEN' and 'EAGER'. Both words describe a strong desire or enthusiasm for something. 'KEEN' is an adjective that means having or showing eagerness or enthusiasm, while 'EAGER' is an adjective that means having or showing KEEN interest, intense desire, or impatient expectancy. Both words are often used to describe someone who is very enthusiastic about something and is willing to put in the effort to make it happen.