4000 Duolingo Vocabulary List

a. bare and pure; completely unclothed
The brightened comet in the constellation Virgo may even be visible to the naked eye, allowing members of the public worldwide to join in this historic moment in astronomy.

ad. by name; by particular mention; expressly; that is to say
Lydia briefly stated the business in hand, namely to choose a secretary and treasurer for the committee.

n. the addictive drug, such as opium that reduces pain, alters mood and behavior; inducing sleep
Some patients seek alternative solutions to long-term narcotic painkillers.

n. biologist knowledgeable about natural history
Experts believe the elderly creature, which weighed a hundred and fifty kilograms, was once the British naturalist's personal pet, Charles Darwin.

n. the feeling of sickness in the stomach by an urge to vomit; strong aversion; disgust
Side effects include dizziness, nausea, and falling asleep.

a. relating to, or adjacent to the sea; relating to marine shipping or navigation
We really don't yet have technology that can effectively detect the presence of radiation in naval cargo.

n. guidance of ships or airplanes from place to place
Such frequencies can be extremely valuable to companies that provide wireless services such as mobile phone networks or satellite navigation systems.

a. clean or orderly; tidy, with everything in its place
As she said this, she came upon a neat little house on the door of a bright brass plate.

a. poor; indigent; being in need; impoverished
Economists and poverty researchers say multiple factors may account for the increase in needy college graduates.

v. cancel out; make ineffective or invalid; deny
A sudden surge of adrenalin can negate the effects of fatigue: there's nothing like a good shock to wake you up.

a. adverse; involving disadvantage or harm; pessimistic
I think our countries are very similar in the negative attitudes that people have towards mathematics.

v. disregard; ignore; pay little or no attention to
Iraqi sovereignty does not neglect the U.S. promise to protect the residents of Camp Ashraf.

n. neglect; failure to take reasonable care; state or quality of being negligent
As for employment, this negligence is apparent in various aspects, such as qualification and training.

a. failing to be careful enough or to give enough attention to your responsibilities; inattentive
Did she like that negligent housekeeper?

a. capable of being negotiated; transferable by assignment or endorsement to another person
Make sure the promissory note that the buyer signs are fully negotiable, that is, transferable to another party.

n. discussion intended to produce an agreement
After two weeks of negotiation between Transocean, the American-based company operating the rigs, and local union representatives ended in deadlock.

a. characteristic of a revival of an earlier classical style
In contrast to Shakespeare's plays, those of neoclassical playwrights such as Racine and Moliere develop a single plotline and are strictly limited in time and place.

n. a colorless, odorless gaseous element that gives a red glow in a vacuum tube
From a distance, downtown Johannesburg looks impressive, with a collection of skyscrapers and neon lights.

a. agitated; worried and anxious
It was talking in a hurried nervous manner, smiling at everything that was said, and went by without noticing her.

n. a cell that is specialized to conduct nerve impulses
The neuron is the basic building block of the nervous system.