Is exfinaty a real word

Yes, Virginia.

I think you're talking about " Xfinity ".

It's a word made up by the Comcast cable company to represent

their internet service.

Languages are not carved in stone. They do change. Words

can be made up by anybody, and if a new word catches on

and people everywhere start using it, then it's a real word, and

it gets added to the dictionary.

Here are some words that were made up by companies to

represent them and their products. Then, of course, the

companies spent a lot of money to advertise the products

and sell them, so people started using the new made-up

words, and now they're real English words.

kodak

kleenex

frigidaire

victrola

motorola

iphone

android

verizon

xfinity

No, but infity and xfinity are words