Ashwagandha (Withania Somnifera) is a sanskrit word which means smelling like a horse. This word seems to be originating from the odor of its root which resembles that of a sweaty horse.. Ashwagandha also known as Indian winter cherry is a great anti-stress herb which reduces your stress level and depression. It is an excellent rejuvenator that increases stamina and vitality. It is well known as Indian Ginseng. The herb is also found to enhance physical and mental ability and it is a wonderful natural tonic for overall health.