No, it was invented for the Walt Disney movie Mary Poppins in the 1960s as a word which is very long and hard to say. It does not actually mean anything--it's a nonsense word in a song. It is actually spelled supercalifragilisticexpialidocious.
It is not a real word with a real meaning.
The root word in "really" is "real."
Yes. The word "is" is a real word. of course it is.
Yes it is a real word.
Yes, "answer" is a real word.
no it is not a real word
No, that is not a real word.
It is no where near a real word
Yes, it is a real word
yes it is a real word
Shurbby is not a real word.
No ter is not a real word