A censor is an official who watches others for correct behavior.
Currency is something, such as coins or appear money, that is used as a medium of exchange.
To unify is to make into a single unit.
A civil service is the administrative service of the government.
A tenant farmer is a farmer who works land owned by someone else and pays rent in cash as a share of the crop.
A generation is a group of individuals born and living at the same time.
A waterwheel is a wheel made to turn by the water flowing against it.
An acupuncture, originally, a Chinese practice of inserting fine needles through the skin and specific points to treat disease or release pain.
A network is a connected system.
A link is a connecting element or factor.