Base words A base word is the most basic form of a word. It holds the most meaning when prefixes and suffixes are added. It is helpful to understand base and root words in order to spell well. Becoming familiar with these words will give you a solid foundation for spelling. Some people confuse root words with base words. The difference is that root words cannot stand alone. A base word can stand alone but often has a prefix or suffix added to it. Below is a table of some common root words, their meaning and an example. Below is a table of some common base words and how they can be changed by using a prefix or suffix. Root Meaning Example Base Prefix Suffix alter- other alternate agree disagree agreement anni- year anniversary build rebuild building aqua- water aquatic courage encourage courageous auto- by oneself automatic direct redirect directory bio- life biology happy unhappy happiness -brev- short abbreviate head behead header -chrom- colour monochrome like dislike likely -derm- skin dermatologist order preorder ordered dent- tooth dentist play replay playful equ- equal equate print misprint printable -ject throw eject search research searching -loc- place location state interstate statement min- small minimal -port- carry portable sequ- follow sequel -son- sound unison vit- life vitality For a better understanding of root and base words use the internet to watch this video: http://www.bbc.co.uk/skillswise/topic/root-words