Answer:
4. the basic part of a word that is also the source of its essential meaning.
Step-by-step explanation:
When we remove all the affixes (letters added at the beginning or end of a wordto make a new word) from a word, what is left is the root , which is the element that may or not be a word, and may have several forms and meanings. For example: The root of the word sitting is "sit". Many words in English have Latin and Greek roots.