The English language has its roots in several languages, including
Greek, Latin, and older forms of English, German, and French.
Learning to recognize common roots and affixes (prefixes and
suffixes) will help you build your vocabulary and improve your
ability to make educated guesses about unknown words you encounter
in reading and test-taking situations.
For eg, lets look at the root amphi, ambi which means
both sides , round Let look at few words that
have this root,
amphibian - that can live both on water and land ambidextrous - Able to use both hands with equal facility
ambivalent - confusion.
The root word amphi means both side - so even you dont know the
meaning of word amphibian you can "intelligently guess" that it is
some thing that can be in both sides. Like wise you can do
intelligent guessing for other words also. So enhance your
vocabulary power by building your Root word strenth.