| Word root/prefix | Root Meaning | Words based on the Root |
| Anti | against, opposite of | Antibody - a substance that destroys micro-organisms Anticlimax - a change from a serious subject to a disappointing one Antiseptic - preventing infection Antisocial - opposing social norm |
| Bell/i | war | Bellicose - warlike Belligerent - hostile, ready to fight Rebel - person who opposes and fights |
| Bi/n | two, twice, once in every two | Biannual - happening twice a year Biathlon - sporting event combining rifle shooting and cross-country skiing Binoculars - optical device with two lenses Bilateral - of or involving two sides |
| Bibli/o | book | Bibliology - the literature or doctrine of the Bible Bibliography - a list of books used as sources Bibliomania - an extreme love of books Bibliophile - a person who loves books |
| Bio | life, living matter | Biodegradable - capable of being decomposed by e.g. bacteria Biography - a life story written by another person Biology - the science of life Biosphere - earth's surface inhabited by living things |