Essential Words for the TOEFL Lesson 28 Vocabulary Test
- aggravating (n. aggravation; v. aggravate)
adj. making worse; annoying
The aggravating delay was caused by road repairs.
The shortage of work aggravated the crisis in the small town.
- amusement (adv. amusingly; adj. amusing; v. amuse)
- something that holds interest and is enjoyable
We listened in amusement as he tried to convince his friend to lend him $50.
His amusing comment made everyone laugh.
- conceivably (adj. conceivable; v. conceive)
adv. feasibly; believably
They could conceivably earn first place with their science project.
It is conceivable that humans will travel to distant planets one day.
- convert (adj. convertible; n. conversion)
- to change from one form or state to another
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
The curative properties of certain plants have been well documented.
There is no simple cure for the ills of society.
- debilitating (v. debilitate; n. debility)
The lack of investment savings has a debilitating effect on the economy.
The patient’s debility limited his mobility.
- deplete (adj. depleted; n. depletion)
- to use up; reduce greatly
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.
adj. of a certain amount; having an end; not infinite
There are a finite number of explanations for the unusual results.
Is there a finite number of stars in the universe?
- perceive (adv. perceptibly; adj. perceivable; adj. perceptive; adv. perceptively; n. perception)
- to sense; become aware of
We perceive major differences between the two political parties.
Porpoises are very perceptive mammals.
- security (adv. securely; adj. secure; v. secure)
- the feeling of freedom from danger, doubt, or worry
Her sense of security increased as her grades improved.
We secured all of the doors of the lab before leaving.
adj. the only one of its kind; extraordinary
The platypus is a singular example of a mammal that lays eggs.
Her scientific experiment was a singular success!
- toxic (n. toxicity)
adj. harmful; capable of being fatal
Disposal of toxic wastes is an ongoing environmental issue.
This product has the highest toxicity of any known to science.
- tranquility (adv. tranquilly; adj. tranquil; v. tranquilize)
- calm; quietness
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.
adj. overused or lacking originality; commonplace
He finds the expression “fit as a fiddle” to be quite trite.
She tries to avoid using trite examples and vocabulary in her writing.
- undeniably (adj. undeniable)
adv. clearly true
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.
- underestimated (v. underestimate)
adj. guessed lower than the actual quantity
The underestimated demand for tickets made the theater manager plan better for the next performance.
The treasurer underestimated the cost of the new furniture.