lost in translation

I am looking for a translation of this asian symbol. It is engraved on a piece of ivory that is well over 30 plus years. I have owned it since I was a little kid. Even then it was old so no telling how old it really is. I believe that part of the meaning is ETERNAL or ETERNITY but I am not certain. I really need some information as to the meaning if anyone knows Chinese. Don't be shy, please hit me back with an answer.
Thanks