No in the Webster Dictionary is described as
:An act or instance refusing or denying by the use of the word no,
What they fail to mention is that it’s so dam hard to say, and even harder for some to understand  
Yes, no, maybe so?
Well no, I mean I want to, you know what yes.
No thank you, no I don't want too, not I'm not comfortable, no not interested, no please leave me alone