3 Brush up on your English: WORD FORMATION - NUMERICAL AND NEGATIVE PREFIXES (48 pts)

ambi

both; on both sides

giga

billion

hecto

hundred

kilo

thousand

mega

million

multi

many

quint

five

semi

half

sept

seven

uni

one

bi

two

cent

hundred

deca / dec / deci

ten

hemi / semi

half

hexa / sexa

six

hyper

over; excessively

hypo

under; below normal

mono

one

nove / non

nine

oct

eight

penta

five

poly

many

tri

three

semi-final

a match or stage before the final

multinational

involving or operating in many countries

monocle

a single lens worn in front of one eye

centenarian

a person who is 100 years old or older

tripod

a three-legged stand, especially for a camera

hyperactive

extremely active; more active than normal

pentagon

a figure with five sides

septuagenarian

a person between 70 and 79 years old

sextet

a group of six musicians or singers

triceratops

a three-horned dinosaur

heptathlon

an athletic contest with seven events

quintuple

consisting of five parts, people, or groups

hexameter

a line of poetry with six stressed syllables

quadriceps

the large muscle at the front of the thigh

tetrahedron

a solid shape with four triangular sides

octopus

a sea creature with eight arms

octave

the difference between the first and last notes in a series of eight notes

nonagenarian

a person between 90 and 99 years old

decade

a period of ten years

hexahedron

a solid shape with six flat sides

ambidextrous

able to use both hands equally well

tetrathlon

a sporting event with four events or disciplines

il-

a negative prefix used before words beginning with l

im-

a negative prefix used before words beginning with m or p

ir-

a negative prefix used before words beginning with r

in-

a negative prefix meaning not

un-

a negative prefix meaning not or the opposite of

dis-

a negative prefix meaning not, opposite, or reversal

non-

a negative prefix meaning not

de-

a negative prefix showing removal, reversal, or reduction

mal-

a negative prefix meaning bad or wrong

mis-

a negative prefix meaning wrongly or badly

dishonest

not honest; untrustworthy

irreparable

impossible to repair or put right; irretrievable

illiterate

unable to read or write; unenlightened

inconvenient

causing difficulty; not convenient

inappropriate

not suitable or proper; unacceptable

improper

not correct or not socially acceptable

unjust

not fair

impolite

not polite; rude

unfasten

to open or undo something that is fastened

disqualify

to officially prevent someone from taking part in something

mislead

to make someone believe something untrue

dehydrate

to remove water from something; to lose too much water

malfunction

to fail to work properly

deactivate

to make something inactive or stop it from working

misuse

to use something wrongly or for the wrong purpose

undo

to reverse an action; to untie or open something