the ordered set of letters, symbols, or characters of a written language
Roman and Greek alphabets consisted of many letters.

an organized society where technology and culture are highly developed
Archaeologists are realizing that civilization has always existed.

to damage something so that it cannot be repaired
Jerusalem was completely destroyed in AD 70 by the Roman army led by Titus.

an activity which helps people learn something
Quinn loved his math lesson and always got there early.

a person who conducts explorations by sea
Mason was a navigator on a bomber in World War II.

the condition or position of having political control over a certain country, region, or government
The British Empire had a lot of power in the 1700s.

something which happens or exists before something else and introduces, influences, or leads to its development
The disappearing coastal water was the precursor to the tsunami.

the set of letters or characters used in writing a language
Cuneiform was a kind of script invented by the ancient Sumerians.

a person or thing who represents a larger quality
Egyptian hieroglyphs are symbols for words.

a person who buys and sells goods, services, or stocks
traders or merchants form an important part of the economy.