For example, a 'Gyani' is a person who is not only knowledgeable but also wise.
I think that the word Gyan is a very appropriate one while referring to the Vedas. The Vedas are a storehouse of knowledge, but more importantly, of wisdom. The Vedas contain deep knowledge on various subjects known to civilization in those days, and you would be surprised by how much people knew then.
Aspects of Vedas like Ayurveda contains deep knowledge of various herbs found in nature and their uses in curing diseases and improving health in general. This is the knowledge aspect of it. There are also of course various hymns that describe history and geography as known at that time. This would also come under the knowledge aspect.
The wisdom aspect of the Vedas are mostly contained in the end parts, known as Vedanta. Most philosophical schools of thought in India had their origins in the Vedas. These were the Vedic schools and they accepted the wisdom of the Vedas. The diversity of these schools can be guessed from the fact that you had theistic, monoist and atheistic schools all originating their beliefs and arguments in the Vedas!
Vedic Gyan therefore contains not just knowledge but also wisdom. It would be wrong to think that we know everything today that was known then. There are many different types of knowledge and wisdom (I'll write a lot about these later). The truth is, we know so little.
