... prefixes are:un-, mono-: one (unique, unity, monotonous, monopoly)bi-: two (bigamy, bilateral, bicameral, bicycle)tri-: three (trivial, trident, trinity, triple)quad-, quar-: four (quadrant, ... AM Page 33VOCABULARY FOR TOEFL iBT34◗ Common Prefixesa-, an-: not, withoutamoral (not moral), atypical (not typical)ab-, abs-: from, away, offabduct (to take by force), abnormal (away ... (away from or apart from the standard)ante-: prior to, in front of, beforeanterior (placed before), antedate (to proceed in time, come before)anti-, ant-: opposite, opposing, againstantibiotic...