Practise Toefl 400 Unit 1-13

Front 1

abandon

Back 1

v. To leave; to give up

Front 2

adversely

Back 2

adv. In a harmful way; negatively

Front 3

aggregate

Back 3

adj. Gathered into or amounting to a whole

Front 4

cultivation

Back 4

n. Preparing the land to grow crops; improvement for agricultural purposes

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fertilize

Back 5

v. To supply with nourishment for plants by adding helpful substances to the soil

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intensify

Back 6

v. To increase in power; to act with increased strength

Front 7

irrigation

Back 7

n. The supplying of water to dry land

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obtain

Back 8

v. To gain possession of; to get

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photosynthesis

Back 9

n. The process by which green plants make their own food by combining water, salts, and carbon dioxide in the presence of light

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precipitation

Back 10

n. Water that falls to the Earth’s surface

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anticipate

Back 11

v. To expect; to sense something before it happens

Front 12

catastrophic

Back 12

adj. Extremely harmful; causing financial or physical ruin

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collide

Back 13

v. To come together with great or violent force

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eruption

Back 14

n. A sudden, often violent, outburst

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famine

Back 15

n. Severe hunger; a drastic food shortage

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flood

Back 16

n. An overflowing of water; an excessive amount

Front 17

impact

Back 17

n. A strong influence

Front 18

persevere

Back 18

v. To keep going, despite obstacles or discouragement; to maintain a purpose

Front 19

plunge

Back 19

v. To go down suddenly; to decrease by a great amount in a short time

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unleash

Back 20

v. To release a thing or an emotion

Front 21

adapt

Back 21

v. To adjust to the circumstances; to make suitable

Front 22

diverse

Back 22

n. Various; showing a lot of differences within a group

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evolve

Back 23

v. To develop; to come forth

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feature

Back 24

n. Part, characteristic

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generation

Back 25

n. A group of people born at about the same time

Front 26

inherent

Back 26

adj. Naturally characteristic; always found within something, because it’s a basic part of that thing

Front 27

migration

Back 27

n. Movement from one place to another by a group of people or animals

Front 28

physical

Back 28

adj. Related to the body; related to materials that can be seen or felt

Front 29

process

Back 29

n. A series of steps leading to a result

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survive

Back 30

v. To continue living (despite some danger or illness)

Front 31

constraint

Back 31

n. Something that restricts thought or action

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contamination

Back 32

n. Being made less clean by a germ or hazardous substance

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deplete

Back 33

v. To greatly decrease the supply of a resource or material

Front 34

dispose of

Back 34

v. To throw away; to get rid of; to kill

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elementally

Back 35

adv. In terms of elements; basically

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emission

Back 36

n. Sending out from a small space into the general environment; a substance discharged into the air

Front 37

extinction

Back 37

n. Complete disappearance; the end of existence

Front 38

reservoir

Back 38

n. A place where a liquid is collected and stored

Front 39

shrink

Back 39

v. To become reduced in size, amount, or value

Front 40

stable

Back 40

adj. Firm and dependable; showing little change

Front 41

adjust

Back 41

v. To change; to get accustomed to something

Front 42

arbitrary

Back 42

adj. Chosen simply by whim or chance, not for any specific reason

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denominator

Back 43

n. The number written below the line in a fraction

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exponentially

Back 44

adv. At a very fast rate

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infinitesimal

Back 45

adj. Immeasurably small

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maximize

Back 46

v. To increase or make as great as possible

Front 47

parallel

Back 47

adj. Being an equal distance apart everywhere

Front 48

proportion

Back 48

n. A part in relation to the whole

Front 49

rate

Back 49

n. The cost per unit of a good or service; the motion or change that happens in a certain time

Front 50

sequence

Back 50

v. To organize or arrange in succession

Front 51

accuracy

Back 51

n. Precision; exactness

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adjacent

Back 52

adj. Next to

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compress

Back 53

v. To press together

Front 54

feasibly

Back 54

adv. Practically; in a way that can work

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gut

Back 55

v. To empty or hollow out

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integrally

Back 56

adv. In a whole or complete manner

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overlap

Back 57

v. To lie over part of something; to have elements in common

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retain

Back 58

v. To keep or hold

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seep

Back 59

v. To pass slowly for a long time, as a liquid or gas might

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structure

Back 60

n. Something constructed, such as a building

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circulate

Back 61

v. To move throughout an area or group; to move along a somewhat circular route

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corrode

Back 62

v. To be slowly weakened by chemical reactions

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derive

Back 63

v. To come from, usually through a long, slow process

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detection

Back 64

n. Discovering something that cannot easily be found

Front 65

expeditiously

Back 65

adv. Quickly and efficiently

Front 66

implement

Back 66

v. To make use of; to carry out

Front 67

innovative

Back 67

adj. Ahead of the times; novel

Front 68

installation

Back 68

n. Setting something into position for use

Front 69

maintenance

Back 69

n. The act of keeping something in good condition

Front 70

simulation

Back 70

n. An imitation or representation

Front 71

combustion

Back 71

n. The process of burning

Front 72

component

Back 72

n. One part of a system or whole

Front 73

convey

Back 73

v. To transport from one place to another; to transmit or make known

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discretely

Back 74

adv. Separately; distinctly

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nucleus

Back 75

n. A central or essential part around which other parts are gathered; a core

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permeate

Back 76

v. To spread or flow throughout; to pass through or penetrate

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rotate

Back 77

v. To turn around; to take turns in sequence

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solar

Back 78

adj. Of, or relating to, the sun

Front 79

source

Back 79

n. The point of origin or creation

Front 80

trigger

Back 80

v. To set off or initiate

Front 81

acquisition

Back 81

n. The act of taking possession of something

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anomaly

Back 82

n. Something unusual

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consciously

Back 83

adv. With awareness of one’s actions

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degrade

Back 84

v. To reduce in value or strength

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gap

Back 85

n. Opening; a big difference in amount or quality

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indisputable

Back 86

adj. Beyond doubt; unquestionable

Front 87

intervene

Back 87

v. To come between

Front 88

intuitively

Back 88

adv. By means of a natural sense about things that are hard

Front 89

recede

Back 89

v. To move back or away from

Front 90

retrieve

Back 90

v. To bring or get back

Front 91

agnostic

Back 91

adj. Believing that humans cannot know whether there is a god

Front 92

animism

Back 92

n. The belief that natural objects, such as trees, have souls

Front 93

atheist

Back 93

n. One who does not believe in the existence of a supreme being

Front 94

be inclined to

Back 94

v. To favor an opinion or a course of action

Front 95

contemplate

Back 95

v. To consider thoughtfully

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deify

Back 96

v. To worship as a god

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ecclesiastical

Back 97

adj. Relating to a church

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exalt

Back 98

v. To praise or honor

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pious

Back 99

adj. Having or exhibiting religious reverence

Front 100

sacrifice

Back 100

v. Anything offered to a deity as a religious thanksgiving; giving up something in order to have something more valuable later on

Front 101

aggravate

Back 101

v. To make worse; to anger or intensify

Front 102

decrepit

Back 102

adj. Weakened or worn out because of age, illness, or excessive use

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disease

Back 103

n. An unhealthful condition caused by an infection or a longterm physical problem

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fatally

Back 104

adv. Causing death or disaster

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forensics

Back 105

n. The use of science and technology to investigate facts in criminal cases

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persist

Back 106

v. To continue to exist; to hold to a purpose, despite any obstacle

Front 107

prognosis

Back 107

n. An educated guess of how something will develop, especially a disease

Front 108

terminal

Back 108

adj. Located at an end; approaching death

Front 109

vein

Back 109

n. Any of the tubes that form a branching system, especially those that carry blood to the heart

Front 110

wound

Back 110

v. To inflict an injury on

Front 111

anesthesia

Back 111

n. Techniques for reducing sensation and feeling, especially to control pain

Front 112

augment

Back 112

v. To make bigger or better by adding to

Front 113

certifiably

Back 113

adv. In a manner that is officially recognized

Front 114

complication

Back 114

n. A factor that makes something more difficult or complex

Front 115

cure

Back 115

v. To restore to health

Front 116

implant

Back 116

v. To set in firmly; to insert in the body surgically

Front 117

inject

Back 117

v. To insert a liquid by means of a syringe

Front 118

obese

Back 118

adj. Excessively overweight

Front 119

procedure

Back 119

n. A specific way of performing or doing something

Front 120

scar

Back 120

n. A mark on the skin left after a wound has healed; a lasting sign of damage, either mental or physical

Front 121

astrological

Back 121

adj. Related to the study of the position of stars, the sun, and the planets in the belief that they influence earthly events

Front 122

divination

Back 122

n. Foretelling the future by finding patterns in physical objects

Front 123

haunt

Back 123

v. To continually appear (in the form of a ghost) in the same place or to the same person

Front 124

horror

Back 124

n. Strong fear mixed with disgust

Front 125

intermediary

Back 125

n. Acting as an agent between people or things

Front 126

invoke

Back 126

v. To call on for support

Front 127

meditate

Back 127

v. To reflect; to think quietly and deeply for a long time

Front 128

phantom

Back 128

n. A dimly visible form, usually thought to be the spirit of a dead person, a sunken ship, etc.

Front 129

psychic

Back 129

adj. Relating to the supposed ability of the human mind to sense things that cannot be observed

Front 130

self–perpetuating

Back 130

adj. Having the power to renew oneself for an indefinite period of time