If we have nothing in our hand then we say it is emptiness it means we have nothing to give.

Emptiness is a word we can used when we have nothing and we are happy and so we can used word emptiness instead of nothing it gives attraction to people.

If we are very poor and people are helpful in our society and begger comes near to us and the person who has money can't give money to him but the poor family has nothing to give then also they provide something to the begger it gives emptiness happiness.