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Flashcards in 400 Words for TOEFL (Unknown ones) Deck (246)
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1

irrigation

The supplying of water to dry land
In dry areas of the country, you can see ditches all over the farm- land for irrigation.

2

precipitation

Water that falls to the Earth’s surface

3

famine

Severe hunger; a drastic food shortage

4

persevere

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

5

plunge

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

6

constraint

Something that restricts thought or action
The constraints of military life kept Eileen from seeing Private Mor- ris more than once a month.

7

deplete

To greatly decrease the supply of a resource or material The prolonged war depleted the country’s national treasury

8

dispose of

To throw away; to get rid of; to kill
She disposed of her unwanted possessions before moving. The tyrant cruelly disposed of all his enemies.

9

elementally

In terms of elements; basically Elementally, coal and diamonds are the same.

10

arbitrary

Chosen simply by whim or chance, not for any specific
reason. The decision to build a school in Blackberry Township was
arbitrary, without any thought to future housing patterns.

11

denominator

The number written below the line in a fraction In the fraction 1⁄2, the number 2 is the denominator.
Usage tips The phrase lowest common denominator means “the most basic and unsophisticated things that most people share.”

12

infinitesimal

Immeasurably small
The number of contaminants in the water was infinitesimal, so the water was safe to drink.

13

rate

The cost per unit of a good or service; the motion or change that happens in a certain time.
Postal rates in Japan are among the highest in the world.

14

adjacent

Next to
Even though the villages are adjacent to each other, their residents
speak different languages.

15

feasibly

Practically; in a way that can work
Scientists can’t feasibly bring energy from deep ocean currents to
where it is needed—on land.

16

gut

To empty or hollow out
In order to remodel the house, we must first gut it and throw away
all the old fixtures.

17

integrally

In a whole or complete manner
Writing and spelling are taught integrally as part of the reading program.

18

retain

To keep or hold
The rain fell so heavily that the banks of the river could not retain all the water.

19

seep

To pass slowly for a long time, as a liquid or gas might
As the containers rusted, the toxic waste seeped into the ground

20

circulate

To move throughout an area or group; to move along a
somewhat circular route
The gossip circulated quickly through the small town

21

corrode

To be slowly weakened by chemical reactions
Sitting in salt water, the old coins corroded and became very easy to
break.

22

derive

To come from, usually through a long, slow process The Cyrillic alphabet was derived from the Greek alphabet

23

detection

Discovering something that cannot easily be found With new medical technology, the detection of cancer is much easier
nowadays.

24

expeditiously

Quickly and efficiently
Using carrier pigeons, the military commanders exchanged mes-
sages expeditiously.

25

combustion

The process of burning
When air quality is poor, combustion of materials in a fireplace is
prohibited.

26

convey

To transport from one place to another; to transmit or make
known
A messenger conveyed the prince’s letter to the commander of the army.

27

discretely

Separately; distinctly
In order to understand how the engine worked, each component needed to be studied discretely.

28

nucleus

A central or essential part around which other parts are
gathered; a core
The nucleus of many European cities is the town square.

29

permeate

Tospreadorflowthroughout;topassthroughorpenetrate The smell of cooking permeated the entire apartment building.

30

acquisition

The act of taking possession of something
Our recent acquisition of over 2,000 books makes ours the biggest
library in the region.