If you were asked to name the most necessary and important word of all, what would you say? Would it be Love? Mother? Friendship? God? We don't have to study linguistics to drown in the ocean of words we use every day, but the most useful and necessary word has been found by a simple cat! He has just learnt to say it and now he can live his life the way he wants. For example, if he doesn't want to do something he will definitely let his owner know about it with the help of just one word. So what does he say? NO!