Essential Words for the TOEFL (7th edition) » Lesson 28
Word List
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aggravating
n. aggravation; v. aggravate
→ adj. making worse; annoying
syn. irritating
The aggravating delay was caused by road repairs.
The shortage of work aggravated the crisis in the small town.
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amusement
adv. amusingly; adj. amusing; v. amuse
→ n. something that holds interest and is enjoyable
syn. diversion
We listened in amusement as he tried to convince his friend to lend him $50.
His amusing comment made everyone laugh.
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conceivably
adj. conceivable; v. conceive
→ adv. feasibly; believably
syn. possibly
They could conceivably earn first place with their science project.
It is conceivable that humans will travel to distant planets one day.
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convert
adj. convertible; n. conversion
→ v. to change from one form or state to another
syn. alter
When boiled, liquids convert into gases.
The conversion from Fahrenheit to centigrade can be easily made.
-
curative
n. cure
→ adj. being able to restore to good condition
syn. healing
The curative properties of certain plants have been well documented.
There is no simple cure for the ills of society.
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debilitating
v. debilitate; n. debility
→ adj. weakening
syn. weakening
The lack of investment savings has a debilitating effect on the economy.
The patient’s debility limited his mobility.
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deplete
adj. depleted; n. depletion
→ v. to use up; reduce greatly
syn. consume
She depleted all of her savings to buy the new bicycle.
The depletion of the Earth’s oil reserves poses a threat to our current way of life.
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finite
→ adj. of a certain amount; having an end; not infinite
syn. limited
There are a finite number of explanations for the unusual results.
Is there a finite number of stars in the universe?
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perceive
adv. perceptibly; adj. perceivable; adj. perceptive; adv. perceptively; n. perception
→ v. to sense; become aware of
syn. observe
We perceive major differences between the two political parties.
Porpoises are very perceptive mammals.
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security
adv. securely; adj. secure; v. secure
→ n. the feeling of freedom from danger, doubt, or worry
syn. safety
Her sense of security increased as her grades improved.
We secured all of the doors of the lab before leaving.
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singular
→ adj. the only one of its kind; extraordinary
syn. unique
The platypus is a singular example of a mammal that lays eggs.
Her scientific experiment was a singular success!
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toxic
n. toxicity
→ adj. harmful; capable of being fatal
syn. poisonous
Disposal of toxic wastes is an ongoing environmental issue.
This product has the highest toxicity of any known to science.
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tranquility
adv. tranquilly; adj. tranquil; v. tranquilize
→ n. calm; quietness
syn. peacefulness
The tranquility of the lake at sunrise inspired a profound sense of well-being.
His tranquil manner of expression made us all feel more secure.
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trite
→ adj. overused or lacking originality; commonplace
syn. cliché
He finds the expression “fit as a fiddle” to be quite trite.
She tries to avoid using trite examples and vocabulary in her writing.
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undeniably
adj. undeniable
→ adv. clearly true
syn. absolutely
Of all the planets in our solar system, the Earth is undeniably the most conducive to supporting life.
It is undeniable that he has skill, but he needs to show more initiative.
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underestimated
v. underestimate
→ adj. guessed lower than the actual quantity
syn. miscalculated
The underestimated demand for tickets made the theater manager plan better for the next performance.
The treasurer underestimated the cost of the new furniture.
Matching
Choose the synonym.
- curative
- a. healing
- b. gratifying
- c. toxic
- d. conceivable
- limited
- a. sustained
- b. ample
- c. finite
- d. approximate
- amusement
- a. peacefulness
- b. demonstration
- c. diversion
- d. marvel
- security
- a. power
- b. safety
- c. trap
- d. cure
- debilitating
- a. convincing
- b. formidable
- c. accelerating
- d. weakening
- singular
- a. unique
- b. solid
- c. available
- d. resilient
- conceivably
- a. absolutely
- b. aptly
- c. possibly
- d. tranquilly
- alter
- a. sustain
- b. launch
- c. foster
- d. convert
- depleted
- a. retained
- b. consumed
- c. polluted
- d. inundated
- perceive
- a. deny
- b. miscalculate
- c. observe
- d. estimate
Multiple-Choice Test Questions
- Less than one percent of all freight cargo is carried by air, most being carried by surface methods. Nevertheless, this curious fact significantly underestimates the importance of air freight. In terms of value of cargo carried, air transport is greater than all other modes. By the early 1990s Tokyo’s Narita Airport and New York’s John F. Kennedy Airport were handling in excess of one million tons of cargo per year.
The word underestimates in the passage is closest in meaning to- a. understands
- b. assesses
- c. highlights
- d. miscalculates
- Margaret Mead, a well-known cultural anthropologist, was associated with the American Museum of Natural History in New York City from 1926 until her death. In the 1980s, her work, in particular her famous study of Samoa, became a subject of controversy. Her critics alleged that her belief in the predominate influence of culture in shaping personality led her to misread evidence and overgeneralize. Her defenders endorsed her undeniably keen observations.
The word undeniably in the passage is closest in meaning to- a. absolutely
- b. inconsistently
- c. presumably
- d. unexpectedly
- While many people refer to the Arctic as being covered in a “solid sheet of ice,” this trite expression is also incorrect. Ice, a nearly pure solid, contains few foreign ions in its structure. It contains particles of matter and gases, which are trapped in bubbles within the ice. A change in makeup of these materials over time is recorded in the successive layers of ice. This has been used to interpret the history of the environment of Earth’s surface and the influence of human activities on the environment.
The word trite in the passage is closest in meaning to- a. complex
- b. ambiguous
- c. cliché
- d. important
- Wang Wei was a Chinese poet, painter, and scholar of the Tang dynasty. He left behind both a significant body of lyrical poetry and delicately depicted landscape paintings. These paintings reflected a love of nature and an inner tranquility derived from Buddhism and meditation. He is traditionally credited with founding the Southern School of Chinese landscape painting.
The word tranquility in the passage is closest in meaning to- a. peacefulness
- b. amusement
- c. fulfillment
- d. security
- The problem of ocean pollution has been acknowledged at national and international levels. The U.S. Congress passed an act in 1988 that phased in a complete prohibition of ocean dumping by 1991. Also in 1988, 65 nations agreed to stop burning toxic waste at sea by 1994. The legality of the latter measure remains debatable and may be proven unenforceable, mirroring the experience of a 1977 law that attempted the same prohibition.
The word toxic in the passage is closest in meaning to- a. inordinate
- b. debilitating
- c. poisonous
- d. dispersed
- Before Alexander Fleming made his great discovery, he had been studying losozyme, an enzyme found in tears that prevents infection. However, he wanted to find a substance with curative powers, something that would keep bacteria from growing and multiplying altogether. By accident, he noticed a mold growing in one of his laboratory dishes that had this effect. It turned out to be penicillin, one of the most widely used antibiotics today.
In stating that Fleming wanted to find a substance with curative powers, the author means that he was looking for a medicine that would- a. regulate a patient’s exposure to germs.
- b. combat disease-causing bacteria.
- c. control a patient’s body temperature.
- d. increase a patient’s level of infection.
- So-called prophetic dreams in ancient Middle Eastern cultures were often used to help the sick. In classical Greece, ailing people came to dream in special temples where priests and priestesses advised them about their dreams’ curative benefits. A similar practice known as dream incubation is known to have existed in the ancient cultures of Babylon and Egypt.
The word curative in the passage is closest in meaning to- a. corrective
- b. fertile
- c. healing
- d. ample
- Chronic fatigue syndrome is a disorder characterized by at least six months of debilitating fatigue that begins abruptly and is usually accompanied by mild fever, sore throat, tender muscles, joint pain, headache, sleep disorders, confusion, memory loss, and vision problems. Once considered an imagined rather than a specific physical condition, chronic fatigue syndrome remains controversial.
The word debilitating in the passage is closest in meaning to- a. weakening
- b. disruptive
- c. tangible
- d. persistent
- Fireworms are marine worms that inhabit warm tropical waters. They produce an aggravating stinging sensation if touched. One particular species, H. carunculata, found in the coral reefs of the Caribbean Sea, has a body covered with fine, white, brittle bristles that embed themselves in human skin if touched.
The word aggravating in the passage is closest in meaning to- a. disruptive
- b. annoying
- c. irritating
- d. formidable
- Scientists have tried to find a way to make hurricanes less dangerous by analyzing their component parts and neutralizing them. A hurricane contains huge quantities of supercooled water and silver iodide. Seeding the hurricane could conceivably produce some changes in storm behavior. Aircraft seeding experiments have obtained some minor, short-lived changes resulting in decreased wind speeds for a few hours.
The word conceivably in the passage is closest in meaning to- a. presumably
- b. consistently
- c. possibly
- d. noticeably
Answer Key

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