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All Words (112 Words)

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Advanced Words (28 Words)

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Word List

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Word	Meaning	Advanced
breath	n: the air that is taken into and expelled from your lungs; the process of taking into and expelling air from your lungs
intake	n: the act or process of taking food, air, etc., into your body through the mouth; the amount of food, air, or another substance that you take into your body
lung	n: either of the two organs in the chest that people and some animals use for breathing
swell	v: to become larger or more inflated; to become more intense or important
roughly	adv: approximately but not precisely; with a violent manner
molecule	n: a group of two or more atoms held together by attractive forces known as chemical bonds
compound	n: an item composed of two or more distinct elements combined; a chemical formed by the combination of two or more elements
exhale	v: to breathe out air or vapor from the lungs or mouth; to release or emit something slowly or gently
ancient	adj: relating to the long ago, particularly the historical period preceding the fall of the Western Roman Empire; very old
innumerable	adj: too many to be counted
atmosphere	n: the mass of air that surrounds the Earth; the pervading tone or mood of a place, situation, or creative work
compose	v: to write music, poetry, or formal writing; to constitute or make up a whole, or a specified part of it
nitrogen	n: a chemical element with the symbol N and atomic number 7, which is a highly reactive element that forms part of many compounds, including amino acids and proteins
volcanic	adj: relating to or produced by or consisting of volcano
beneath	adv: in or to a lower place than someone or something
planet	n: any of the nine large celestial bodies that circle in the solar system; any celestial body that revolves around a star
crust	n: a hard outer layer that forms on the surface of a liquid as it cools or on a solid as a result of exposure to air or moisture
ingredient	n: one of the things used to make something, especially one of the foods used to make a particular dish
oxygen	n: the chemical element with the symbol O that is present in air and water and is necessary for people, animals, and plants to live
dwelling	n: a house or place that someone is living in
microorganism	n: a very small living thing that may exist in its single-celled form or as a colony of cells and is too small to be seen without a microscope
evolve	v: to develop gradually, or to cause the development of something or someone gradually
fin	n: a thin flat part on the body of a fish or other aquatic animal used for propulsion or balance
argon	n: a chemical element with the symbol Ar that is a colorless, odorless, and inert gas, often used in welding and other industrial processes
radioactive	adj: emitting powerful and dangerous energy when the nuclei (= central parts) of atoms are broken up
decay	n: the process or state of rotting or decomposition by natural causes such as the action of bacteria and fungi; (verb) to rot or decompose through natural causes
potassium	n: a chemical element with the symbol K, atomic number 19, that is essential for the functioning of living organisms
core	n: the most essential or fundamental part of something
vapor	n: a mass of tiny liquid drops in the air
variable	adj: likely to change or vary often; (noun) a symbol, like x or y, that is used in mathematical or logical expressions to represent a value that may be changed
possibility	n: a chance that something may happen or be true
slice	n: a flat, often thin, piece of bread, meat, cheese, etc., that has been cut from a larger piece; a wound made by cutting
numerous	adj: amounting to a large indefinite number
particle	n: a small piece of something; a word or piece of a term with grammatical function but little or no significance
pollen	n: a fine powder substance consisting of microscopic grains produced by plants that facilitate their reproductive process through the process of pollination
fungus	n: a type of organism that includes yeasts, molds, and mushrooms, which are heterotrophic, meaning they do not produce their food and must consume organic matter to survive
spore	n: a reproductive cell that is capable of developing into a new individual without fertilization, especially one produced by certain bacteria, fungi, and algae
liquid	n: a substance, such as water or oil that flows freely and is neither a solid nor a gas
droplet	n: a small drop of liquid
trace	v: to find or discover someone or something that was lost
methane	n: a chemical compound with the chemical formula CH4 with no smell or color, often used as a fuel
carbon	n: a chemical element that can be found in pure form as diamond or graphite, and it is also an essential part of coal and oil and is found in all plants and animals
oxide	n: a chemical compound that contains at least one oxygen atom and one other element
specific	adj: clearly defined or particular to a certain thing or situation; distinct, explicit, and precise
cocktail	n: a drink, usually an alcoholic one, made by mixing one or more spirits (= strong alcoholic drinks) and fruit juice; an appetizer served as a first course at a meal
human-made	adj: created or produced by humans; artificial
dramatically	adv: in a very impressive manner
pollutant	n: a substance or agent that pollutes or contaminates the environment, typically through release into the air, water, or soil
toxic	adj: of or relating to or caused by a poison; poisonous
disease	n: a disorder or illness that affects the body or mind, often characterized by specific symptoms or abnormal functioning of organs or systems
cancer	n: abnormal growth of cells that can invade and destroy surrounding tissues and organs; a disease characterized by the uncontrolled growth and spread of abnormal cells
dam	n: a wall constructed over a river to block the flow of water, mainly used to generate energy
emit	v: to give off or send out something such as light, heat, sound, gas, etc.
naturally	adv: as might be expected; by natural manners
quantity	n: the amount or number of something; magnitude
converse	v: to talk informally
dung	n: solid waste from animals, especially from large animals such as cattle and horses; (verb) to fertilize or dress with animals’ excrement
polycyclic	adj: a chemical compound or organic molecule that contains two or more fused rings or cycles in its structure, often used in the context of environmental or industrial chemistry to describe potentially toxic or persistent pollutants
aromatic	adj: having a strong, sweet smell; fragrant
hydrocarbon	n: an organic compound consisting entirely of hydrogen and carbon
interact	v: to communicate or react with somebody
topography	n: the arrangement and physical features of a particular area or region, including its natural and artificial elements and their relative positions and elevations; the study or description of this arrangement and these features
transformation	n: a complete change in form, nature, or appearance of someone or something
oxidant	n: a substance that causes oxidation, or the loss of electrons, in another substance; a reactive molecule or compound that can damage cells and tissues by causing oxidative stress
sunlight	n: the light emitted by the sun; the rays of the sun
reaction	n: a response that reveals a person’s feelings or attitude; (in chemistry) a process in which one or more substances are changed into others
coal	n: a combustible black or brownish-black sedimentary rock that is found below the ground and burnt to produce heat
release	v: to set free or allow to escape from confinement
concentration	n: the ability to focus all your time and energy on one thing without thinking about anything else.
sulfur	n: (also sulphur) a chemical element with the symbol S and atomic number 16, found in many minerals and sulfur compounds, often used in the production of fertilizers, rubber, paper, and other industrial applications
condense	v: to reduce the volume or size of something, often by removing water or other liquid; to make something shorter, more concise, or more concentrated
blanket	n: a large piece of soft material used to cover or wrap a person or thing to keep them warm; (adjective) broad in scope or content
impair	v: to damage something or make it weaker or worse
visible	adj: capable of being seen; or open to easy view
severe	adj: extremely serious or bad in feeling, manner, or strict and harsh; extremely strong or vigorous
smog	n: a type of air pollution that forms a mixture of smoke and fog resulting from the combustion of fossil fuels, industrial activity, and motor vehicle emissions in urban areas
plague	n: any epidemic disease with a high death rate; (also called pest) a serious, sometimes fatal, infection spread by rats that causes fever and swellings on the body
advent	n: the arrival or beginning of something; the coming of Jesus Christ at his birth
exhaust	n: the system in a vehicle that removes waste gases from the engine; (verb) to make someone completely tired
fossil	n: any preserved remains, impression, or trace of any once-living thing that has become hard and turned into rock
fuel	n: a substance that is typically burned to generate heat or energy
burning	adj: intense or scorching heat
react	v: to take action in response to something
ozone	n: a poisonous gas with the chemical formula O3, which has a strong smell
shield	n: a protective covering or structure, especially in the past, that soldiers held in front of their bodies to protect themselves
ultraviolet	adj: relating to or occupying the part of the spectrum beyond the violet end, especially radiation
ray	n: a narrow line of light, heat, or another form of energy
photochemical	adj: relating to or caused by the chemical effects of light, particularly those that involve the absorption or emission of light by molecules in a reaction
fog	n: a thick cloud consisting of tiny water droplets or ice crystals suspended in the air at or near the Earth’s surface; a weather condition in which visibility is reduced because of a cloud of water
dense	adj: containing a large number of people or something with little space between them
hazardous	adj: involving risk or danger; unsafe or unhealthy
contribute	v: to give something, especially money or goods, to provide or achieve something together with other people
climate	n: the weather in a particular location averaged over some long period
trap	n: a piece of equipment or hole for catching animals or people; (verb) to catch animals or people and prevent them from escaping
industrial	adj: of or relating to or resulting from industry
spike	n: a narrow, thin, pointed piece of metal, wood, etc.; a sudden large increase in the magnitude or concentration of something
emission	n: the act of production or sending out gas, heat, light, etc.
fundamental	adj: forming an essential base or core from which everything else develops or is affected
countermeasure	n: an action taken to counter or offset another action
equip	v: to provide a person or a place with the things that are needed for a particular purpose or activity
catalyst	n: a person or thing that causes an important event to happen or changes the current situation rapidly; (chemistry) a substance that initiates or accelerates a chemical reaction without being changed itself
converter	n: a device or machine that converts one form of energy or substance into another form; a device that changes the format or type of a file or document
monoxide	n: a compound containing one oxygen atom and one other element, such as carbon monoxide (CO) or nitrogen monoxide (NO)
electrify	v: to make a machine or system work by using electricity; to make someone extremely enthusiastic about or interested in something
infrastructure	n: the basic systems, services, or features that are necessary for an organization or country, such as transport and power supplies
automobile	n: a road vehicle that has four wheels and is powered by an engine, used for transporting people or goods
essential	adj: indispensable; fundamental
universal	adj: existing or affecting everywhere or everyone
remedy	n: a successful way of dealing with or improving an unpleasant or difficult situation or curing an illness
pollution	n: the introduction of harmful substances or waste into the natural environment that causes adverse change
unique	adj: being the only one of its kind; unlike anything else
regulation	n: an official rule made and maintained by a government or some other authority; the act of controlling or directing something according to a rule