Important (Read me first!)

This post is a commentary and does not contain any copyrighted material of the reference source.

We strongly recommend accessing/buying the reference source at the same time.

Reference Source

You can understand each word more deeply by utilizing the following YouTube Posts and PDF files.
Also, see how to use Englist.me?

All Words (99 Words)

You can learn all the words from basic to advanced levels in the order they appear in the contents.
If you want learn all words quickly, you can use Quick Look Video.

Quick Look


YouTube Post

Vocabulary Builder

Advanced Words (23 Words)

If you are confident in your vocabulary, you may prefer to study with content that covers only advanced-level words.

YouTube Post

Vocabulary Builder

Word List

You can quickly review the words in this content from the list below.

hydrogenn: the chemical element that is the lightest gas is colorless, odorless, tasteless, and combines with oxygen to form water
atomn: the smallest unit of ordinary matter that forms a chemical element, composed of a nucleus and one or more electrons bound to the nucleus
outermostadj: farthest from the center or the inside; located on or relating to the outer part or surface of something
atmospheren: the mass of air that surrounds the Earth; the pervading tone or mood of a place, situation, or creative work
exospheren: the outermost region of the Earth’s atmosphere or the atmosphere of another planet, where the density of molecules is extremely low, and the gas particles transition into space, characterized by a gradual transition from the Earth’s atmosphere to the vacuum of space
Atlanticadj: relating to or located near the Atlantic Ocean, which is the second-largest ocean on Earth, located between the continents of North and South America to the west and Europe and Africa to the east
soiln: the top layer of Earth in which plants grow
overcomev: to succeed in controlling or dealing with something, such as a problem or difficulty; to defeat or overwhelm someone
gravitationaladj: relating to or caused by gravity (= the force that attracts objects towards one another)
roughlyadv: approximately but not precisely; with a violent manner
leakv: to allow liquid or gas to get in or out from a hole or crack in a pipe or container
whalen: a very large sea mammal that has a streamlined body and breathes through a blowhole on the head; a very large person; impressive in size or qualities
atmosphericadj: about or located in the earth’s atmosphere
moleculen: a group of two or more atoms held together by attractive forces known as chemical bonds
seepv: to flow or leak slowly and gradually through small openings or spaces; to ooze or trickle out gradually
planetn: any of the nine large celestial bodies that circle in the solar system; any celestial body that revolves around a star
stabilityn: the quality or attribute of being firm and steadfast
sustainv: to supply enough of what somebody or something needs to survive or exist; to accept as valid
extentn: the point or degree or area to which something extends
imperfectlyadv: in a faulty or incomplete way
plumbingn: the system of pipes, fittings, and fixtures that are used to distribute water and remove waste in a building or structure; the trade or profession of installing and maintaining such systems
spotn: a particular location or place; a small round or roundish area, differing in color or feels from the surface around it
shaftn: a long, narrow part or section of an arrow, hammer, golf club, etc.; a long, narrow passage consisting of the vertical part of a column
reservoirn: a natural or artificial lake used to store water for community use; a large or extra supply of something
neglectv: to not give enough care or attention to something; to leave something undone
abandonv: to leave a place, thing, or person with no intention of returning; (noun) a feeling of extreme emotional intensity
undergroundadj: under the surface of the ground; a secret group organized to achieve a specific purpose, such as overthrowing the government or occupying a force
greenhousen: a building with walls and roof made chiefly of transparent material, such as glass, for growing plants in
methanen: a chemical compound with the chemical formula CH4 with no smell or color, often used as a fuel
crackv: to break or cause to break without dividing into separate parts; (noun) a line on the surface of something along which it has separated without breaking
looseadj: not securely fixed or fastened in place or able to be detached or separated from something
leakyadj: having a hole or crack that allows liquids or gases to pass through it
scatterv: to cause to separate and go in different directions
emitv: to give off or send out something such as light, heat, sound, gas, etc.
estimatev: to guess or calculate the cost, size, value, etc. of something
metricadj: using or relating to the meter as a unit of length; a system of related measures that facilitates the quantification of some particular characteristic
innermostadj: situated or occurring at the deepest or most central part or point; relating to one’s deepest or most private thoughts, feelings, or experiences
boundaryn: a real or imaginary line that marks the limit or extent of something and separates it from other things or places
coren: the most essential or fundamental part of something
originn: the first existence or beginning of something
rotationn: the action or process of moving in a circle around an axis or center
liquidn: a substance, such as water or oil that flows freely and is neither a solid nor a gas
solidadj: hard or firm; characterized by good substantial quality
magneticadj: having the properties of attracting or repelling certain materials containing iron or steel
barriern: a fence or other obstruction that makes it hard to move or get in; any condition that makes it difficult to make progress or to achieve an objective
cosmicadj: relating to the universe or cosmos; vast or limitless
radiationn: the energy that comes from a nuclear reaction in the form of rays, waves, or particles and that can be hazardous to health
insulatev: to protect something by interposing material that prevents heat, noise, electricity, etc.
constantlyadv: all the time
surroundingadj: that is near or around, or closely encircling something
mantlen: a layer of rock between the surface and the core of a planet or moon; a loose sleeveless cloak or shawl; the responsibilities of an important position or job that passes from one person to another
tectonicsn: the study of the processes that shape the Earth’s surface, including the movements of tectonic plates, earthquakes, and volcanic activity
magman: molten rock that is located beneath the earth’s surface and can solidify to form igneous rock
moltenadj: in a liquid state as a result of being heated
solidifyv: to make solid, firm, or compact; to cause to become solid
disappearv: to cease to exist or be visible
exposedadj: having no protection or shield from something, such as bad weather, attack, or criticism
harshadj: severe and unkind; extremely tough and unpleasant to inhabit
rayn: a narrow line of light, heat, or another form of energy
immediateadj: happening or done without delay or occurring shortly after something else
emissionn: the act of production or sending out gas, heat, light, etc.
climaten: the weather in a particular location averaged over some long period
structuren: the way of construction of something and the arrangement of its parts, or a complex thing constructed of many parts
efficientlyadv: in a way that produces maximum output with minimum effort or expense
absorbv: to take in a fluid or other substance gradually
radiatev: to spread out or emit something, such as light or heat, in all directions
trapn: a piece of equipment or hole for catching animals or people; (verb) to catch animals or people and prevent them from escaping
incredibleadj: unbelievable; enormous
carbonn: 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
oxiden: a chemical compound that contains at least one oxygen atom and one other element
comparableadj: able to link the similarities or differences with others; similar or equivalent to someone or something
poundn: the standard unit of money in the UK; the standard unit of weight equal to 16 ounces
coaln: a combustible black or brownish-black sedimentary rock that is found below the ground and burnt to produce heat
extensiveadj: covering a large area; having a wide range
surveyn: an investigation of the opinions, behavior, etc. of a particular group of people, made by asking people questions
anthropologyn: the scientific study of humanity, concerned with human behavior, human biology, cultures, societies, and linguistics in both the present and past, including past human species
leachv: to remove or drain away something from a material, usually by seeping or filtering, such as chemicals from soil or minerals from rock
toxicadj: of or relating to or caused by a poison; poisonous
groundwatern: water that is present beneath the surface of the ground, especially in soil or in pores and crevices in rock
contaminatev: to make something impure, unclean, or poisonous by contact or mixture
ecosystemn: all the plants and living creatures in an area and the way they affect each other and the environment
pumpv: to cause water, air, gas, etc. to move from one place to another by using mechanical equipment; to get or supply something such as money, information, etc. in significant quantities
cementv: make fast as if with cement; (noun) a building material that is a powder made of a mixture of calcined limestone and clay, used with water, sand, and small stones to make concrete
depthn: the distance between the top and bottom of something; between the top surface and a distance below it
governmentn: the group of people with authority to control a country or state
defunctadj: no longer existing, operational, or functioning; extinct or dead; obsolete or out of use
expensen: the money, time, or effort incurred or required for something
historicadj: famous or significant in history, or potentially so
dodgev: to move quickly and suddenly to avoid something; to evade or sidestep
policyn: a set of rules, guidelines, principles, or procedures that govern decision-making or action, often used in the context of business or government; a course of action or plan of action adopted or followed by an organization or individual to achieve a goal or objective
economicaladj: providing a satisfactory return on the money, time, or effort; not using more money, fuel, etc. than necessary
viableadj: capable of being done as intended; able to succeed
concertedadj: involving the joint activity of more than one person, government, country, etc.
feen: a sum of money charged for a particular service
coordinatedadj: effectively arranged or organized so that all the parts work smoothly or systematically together
oversightn: the act of supervising or watching over something; a mistake caused by not paying enough attention to something
massiveadj: enormous amount; very heavy and solid
eliminatev: to remove or get rid of someone or something
drilln: a tool or machine used for making round holes or driving fasteners; a training or practice