Why was Temüjin given the title of Genghis Khan?

He was given the title of Genghis Khan because he united the mongol tribes and was a great conqueror and I think Khan means conqueror or something

Explanation:

I studied him for a presentation

the language of nature was a manifestation from god as he said "let there be light" and there was light the world began to assume visible, comprehensible form.

what ever we know now think of the old vision of creation we can be sure that with out the speaking of word -without language- we would have no science today with its striking power to illuminate the world.