Oak has been used as a Quinine substitute in the treatment of fevers. Tannins provide many of the healing properties of oak. Tannins bind with proteins in tissues, making a barrier resistant to bacterial invasion. Tannins strengthen tissues and blood vessels.
The opposite term Occident derives from the Latin word occidens, meaning west (lit. setting < occido fall/set). This term meant the west (where the sun sets) but has fallen into disuse in English, in favor of Western world.
The term interdependent means mutually or concurrently dependent. This means that all members of a group need each other. This can be applied to ecology (the balance of nature) and to commercial activities between regions or countries. It is used to indicate that, in most cases, no one is truly self-sufficient. The term interdependent means mutually or concurrently dependent.