in, inn

In or in means not out, or inside of, or within the limits of, in space, time or ideas--
Did you let the cat in?
Put the milk in the refrigerator.
Drop the coin in the slot.
In our town...
It will be over in a week.
There are no pictures in this book.

In also means undergoing a state of--
The wheels are in motion
They are in love.
This is in style now.
In may mean using, or by means of--
In my humble opinion...
In a word, no.
In so many words...
Can you read that sign? It's in Spanish.

Inn or inn ( rhymes with in ) means a hotel, motel or bread-and-breakfast--
"There was no room at the inn..."
They stayed at an old-fashioned inn while on vacation.

Now that you know that, you can say--
"Is there a fireplace in the inn?"

Note-- "in-" is a prefix ( something added to the beginning of a word ). When "in-" is added to a word, it alters the meaning of the original word to its opposite or negative, much the same as "un-" does--
expensive, inexpensive
tolerant, intolerant
accurate, inaccurate
accessible, inaccessible
adequate, inadequate
ability, inability
advisable, inadvisable
animate, inanimate
necessary, unnecessary
kind, unkind
fortunate, unfortunate
"In-", as a prefix, may also mean inside of, or withing the limits of--
The Great Lakes are well known inland waterways.