The word "unfresh"

I don't find it in any standard "advanced" dictionary.

Of course there are a million Google hits, so there's no question people use it.

http://en.wiktionary.org/wiki/unfresh

Someone added it to Urban Dictionary (a hodgepodge of mostly newly-coined prurient, indecent, or smutty words), but it got as many thumbs-down votes as thumbs-up votes.

http://www.urbandictionary.com/define.php?term=unfresh

The Shorter Oxford English Dictionary lists "unfresh" (not fresh) as a main entry, saying it is first cited in the middle of the nineteenth century. But even if it had not been in there, it would still be a word. We are free to make any word we like with affixes and roots. I doubt that any dictionary would be able to list every single "un-" word or "non-" word, and there is no reason to.

Well said, enoon.

Even so, I still never say, "Let's throw the unfresh bread out in the garden for the birds."
I always use "stale." - stale bread.
Also with air:
The air smells stale - let's open a window.

I for one feed birds fresh bread, and think English can live without unfresh.

The word unfresh can be used i.e. there is no fresh trout in this store, so I will buy the unfresh trout. It sounds more honest than using the word frozen.