The document provides a summary of common prefixes referring to amount, number, and negation in English. It lists prefixes with their meanings and sample words containing each prefix. Some key prefixes mentioned are: - Bi and tri meaning two and three respectively - Centi meaning hundred - Micro and milli referring to small and thousand - Mono, multi, and poly relating to one, many, and many - Semi meaning half - Prefixes like a, anti, contra, dis meaning not or against The document concludes by listing prefixes like un, non, pseudo that convey a negative or false meaning. It is intended to help readers understand common English prefixes and their functions in vocabulary.

1. Udonthani Rajabhat University

2. Prefixes referring to amount or
number
Prefix Meaning Sample
Word
Bi Two
bifurcate
Centi Hundred
centipede
Deci ten
decimate

3. prefix Meaning Sample
word
Micro small microfilm
Milli thousand milliampere
Mono one monotone
Multi many multicolored

4. prefix Meaning
Sample word
poly- many
polysyllabic
semi- half
semifinal
tri- three tricycle
uni- one

5. Prefixes Meaning “not” (Negative)
Prefix Meaning Sample
Word
a not anonymous
anti against antidote
contra against, opposite contraband
dis apart, away, not discourage

6. Prefix Meaning Sample
Dis- apart, away,not dissuade
Word
In/il/ir/im not
incapable
Illiterate
Irrelevant
Impossible

7. Prefix Meaning
Sample Word
Un not Undecided
Non not Nonfiction
Pseudo false Pseudo-
octave

8. Group 5
1. Nalinee Sanitchone 55120803105
2. Phutsadee Seehasombat 55120803116
3. Rattiyakorn Satthaklang 55120803122
4. Sineenat Posawang 55120803127
5. Kansita Phophatsathit 55120803136
6. Piyapong Isaranuwat 55120803121
7. Chananchida Khanthee 55120803137