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abolitionist	An abolitionist is a person who supported the ending of slavery in the United States before and during the Civil War. Abolitionists fought hard in various ways to help the slaves become free and to make slavery against the law. The end of slavery finally came in 1865 near the end of the Civil War.
abstract	hard to understand because not based on one's experience of the world. [1/3 definitions]
accomplishment	If you try to do something that is hard, it is an accomplishment when you finish it. An accomplishment is something that a person has done or finished in a successful way. People are often proud of their accomplishments or just happy that they were able to do them.
achieve	to do or carry out successfully; accomplish. [1/2 definitions]
achievement	something achieved through hard work, courage, or skill. [1/2 definitions]
acorn	An acorn is a very hard brown fruit that grows on a certain kind of tree called an oak. People can't eat acorns, but squirrels and chipmunks do.
addict	to cause to depend on something that is hard to give up. [1/3 definitions]
adjective	a word that describes a noun or pronoun. In the sentence, "It was a hard test," the word "hard" is an adjective. It describes the noun "test."
aerobics	When people talk about aerobics, they are talking about ways of doing exercise that make the heart and lungs work a little bit hard. This working of the heart and lungs helps the body use oxygen better. Running, swimming, biking, and dancing are some forms of aerobics.
alabaster	a hard, white stone that is often translucent. Alabaster is often carved to make statues and ornaments. [1/2 definitions]
allergy	When you have an allergy to something like a plant or food, something bad happens to your body when you touch it or eat it or have some other contact with it. An allergy can make you sneeze, itch, cough, or make it hard for you to breathe.
alligator	a large reptile with short legs, a long body and tail, and a long, wide snout. Alligators are protected by thick skin with many hard bumps. They live in rivers, lakes, swamps, and other bodies of water in the southeast United States and in China. They usually eat insects, fish, turtles, snakes, birds, and other water animals, but have been known to attack small land mammals. They are closely related to crocodiles. Chinese alligators are endangered because their habitat is being changed by people.
almond	the hard oval seed of this tree that is like a nut and eaten as food. [1/3 definitions]
amaze	When something amazes you, it surprises you very much and it might be hard to believe that it is real or true.
amazing	When something is amazing, it is hard to believe that it is real or that it is really happening. Things that are amazing are sometimes good, but sometimes they are just hard to believe.
amber	a hard, yellow or brown material that is used to make jewelry. It is a fossil that comes from the resin of pine trees. [1/2 definitions]
ambition	When you have ambition, you have big goals for your life that you want to make come true. When you have a particular ambition, you have a certain goal that you want to reach. Probably you will try hard to have success in reaching it.
anthracite	a hard, shiny coal that burns with little flame or smoke.
apple	An apple is a hard, round fruit with red, green, or yellow skin. Apples grow on trees. [1/2 definitions]
aptitude	An aptitude is a natural ability to do something. If you an have aptitude for something, you will be able to do it without trying very hard or you can learn to do it easily.
armadillo	a mammal whose body is protected by hard, bony plates. Armadillos live in Central and South America, and the southern United States. Some kinds of armadillos are only six inches long; other kinds grow up to four feet in length. They eat mostly insects and are related to sloths and anteaters.

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