Mega = million. There is an international organization which looks at weights and measures, called Bureau Poids et Measures, BIPM, and they decide on the names for multiples and sub-multiples. Which today go up as far as 10-24 or 1024, I think. You can check with your favourite search engine.
In ancient Greek - I don't really know, and they mayn't have had a need for millions.
ANSWER:
Mega means big or large in Greek.
The English word that comes from the Greek word "grapho" is "telegraph."
hypocrisy is the English word derived from the Greek word hypokrites
The common English word that comes from the Greek word "demokratia" is democracy.
I'm not sure about few, but one is mono. This word does come from the Greek.
The word "hand" comes from Old English.
The English word "drama" comes from the Latin which comes from the Greek.
galaxy in greek is "γαλαξιας"(ghalaxias) and it means the same as in english.
The word comes from Latin 'vaporem' meaning 'exhalation'.
It is prophetes (pronounced prophaytays). The English word comes from the Greek, hence the similarity.
No, it comes from the Middle English.
Hypnotism.
The word "help" comes from the Old English, and has no meaning in Greek. The Greek word for help is voithia (vo-EE-thee-ah).