(noun) Usen (also Ysun) is the Apache name of the One-God believed to have created all people.
When a child, my mother taught me to kneel and pray to Usen for strength, health, wisdom and protection. ~Geronimo~
by Name is already being used? September 14, 2013
Synonym for "used." Although it has the same meaning, it is not always used in the same context.

For example, you can say:
-I've used the shovel.
-I've usen the shovel.

And you can say:
-I used the shovel.

But you can't say:
-I usen the shovel.

So, in the end, it's just a word that replaces used and sound better in some cases.
I've "usen" it

It's no good, I've "usen" it before.
by Cetraey October 2, 2011