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 (76 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 (27 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.

mammaln: any animal of which the female gives birth to live young, not eggs, and feeds her young on milk from her own body
vertebrateadj: relating to animals that have a backbone or spinal column, such as mammals, birds, reptiles, amphibians, and fish
backbonen: the spinal column of a vertebrate; a symbolic representation of strength and resilience
distinguishedadj: (used of persons or their work) standing above others in quality, attainment, or reputation
featn: a notable or impressive achievement, especially one that requires great skill or bravery
furn: the hairy coat of a mammal, especially when fine, soft, and thick
lungn: either of the two organs in the chest that people and some animals use for breathing
nourishingadj: providing the necessary nutrients or sustenance to support health and growth
creaturen: a living being, especially an animal
biologyn: the scientific study of life and the natural processes of living things
remarkableadj: worthy of attention because unusual or special
placentan: a temporary organ that feeds a fetus (= unborn and developing baby) inside its mother’s womb
giraffen: a tall African mammal with a very long neck and legs, typically with distinctive brownish-yellow fur and dark patches; an animal often found in zoos and wildlife preserves
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
solidadj: hard or firm; characterized by good substantial quality
diskn: a flat, circular plate, typically made of metal, glass, or plastic, used for storing data or playing music
tissuen: an ensemble of similar cells of the animal or plant that together carry out a specific function
attachen: a person who works at an embassy, usually having a specialized area of responsibility; a shallow and rectangular briefcase
uterusn: a hollow muscular organ in the body of a woman or other female mammal in which a baby or young animal develops before birth
developv: to grow or expand; to improve or refine through a process of progress and refinement, often to achieve greater sophistication or complexity; to elaborate or add detail to something that is in the process of being created
embryon: an animal organism in the early stages of growth, either in its mother’s womb or in an egg, or a plant that is developing in a seed
calfn: a young cow, bull, or other domestic bovine animals
pregnantadj: having a baby or young animal developing in the uterus
funneln: a tube or pipe that is wide at the top, sloping sides, narrow at the bottom, used for pouring liquids or powders into a small opening; a smokestack on a ship or steam engine
nutrientn: any substance that is essential for the maintenance and growth of living things
oxygenn: the chemical element with the symbol O that is present in air and water and is necessary for people, animals, and plants to live
straightadj: extending or moving in one direction without bending or curving; having no deviations
umbilicaln: relating to a flexible cord-like structure that connects a developing fetus to the placenta in the mother’s uterus during pregnancy, called umbilical cord; connected or corresponding closely to something essential, such as a source of nourishment or support
cordn: a strong, thick, or thin thread or rope; a piece of plastic-coated wire used to transport electricity to a piece of equipment
exportv: to send goods or services to another country for sale; to transfer electronic data out of a database or document in a format that other programs can use
wombn: the organ of a woman or female mammal in which a baby develops before birth
instancen: a particular example or single occurrence of something
respiratoryadj: relating to the organs and processes involved in breathing, such as the lungs and the act of inhaling and exhaling air
circulatoryadj: relating to the system that moves blood through the body, which includes the heart, arteries, and veins
disposev: to put things or people in a particular manner or position; to incline someone towards a specific activity or mood; throw or cast away
fattyadj: containing a lot of fat
marsupialadj: relating to or characteristic of mammals of the order Marsupialia, which typically carry their newborn offspring in a pouch on their abdomen; referring to animals such as kangaroos, koalas, and opossums
pouchn: a small bag or container with a drawstring or zipper used to carry small items; a small sac or pocket within an organ or tissue in the body
weighv: to have a particular weight; to carefully evaluate things before making a conclusion
gramn: a metric unit of weight equal to one-thousandth of a kilogram
equivalentn: having the same value, quality, meaning, purpose, etc.
grainn: wheat or any other small hard seeds used as a food; a relatively small granular particle of a substance
kangaroon: a large marsupial native to Australia with powerful hind legs for jumping and carrying young in a pouch on the mother’s belly
crawlv: to move forward slowly, as people or animals with their bodies near the ground
vaginan: the passage in the body of a woman or female animal that connects her outer sex organs to her uterus
sucklev: to feed or nurse at the mother’s breast or a similar source of fluid, usually used for infants or young animals obtaining milk
simultaneouslyadv: at the same time
unfavorableadj: not advantageous or beneficial; opposed to one’s interests or desires
pausev: to take a short break from talking or doing something before continuing
breastn: either of the two round soft parts of a woman’s chest which secrete milk after childbirth
misnomern: a name or term that is inaccurate or misleading, often because it does not accurately describe the thing it is naming
nipplen: the dark part of the skin which sticks out from the breast of a mammal and from which milk can be secreted
monotremen: a primitive mammal that lays eggs instead of giving birth to live young, such as a platypus or echidna
arguablyadv: used when expressing an opinion or idea that you believe can be proven true
echidnan: a solitary, burrowing, egg-laying mammal native to Australia and New Guinea, also known as a spiny anteater, which has a long, slender snout and a specialized tongue for capturing ants and termites
duck-billedadj: referring to the platypus or certain types of birds with a flat, broad bill or snout resembling that of a duck; describing something that has a bill or beak resembling that of a duck
platypusn: a semiaquatic, egg-laying mammal native to Australia and Tasmania, having a broad tail, webbed feet, and a bill resembling that of a duck
referv: to direct someone’s attention, thoughts, or questions to another source or person; to mention, cite, or allude to something as evidence or support
reproductionn: the process by which organisms create offspring; the production of something similar to an original work
excretionn: the process of eliminating waste products from the body; the waste products themselves
reptilen: a cold-blooded animal that has dry, scaly skin and lays eggs on land, such as snakes, lizards, and turtles
dinosaurn: a large extinct reptile, often with an armored back, long neck, tail, and bony plates on the skin
shelln: hard outer covering or case of eggs, nuts, some seeds, and some animals
hatchv: to cause an egg to break to allow a young animal to come out; to produce and expand something that is in an early stage
adaptationn: the action or process of changing to suit different conditions
associatev: to mentally connect someone or something with someone or something else
mammalianadj: of or relating to mammals, a class of warm-blooded vertebrate animals that typically nurse their young and have hair or fur on their skin; characterized by mammalian qualities, such as nurturing and protective behavior
venomousadj: extremely poisonous or injurious; containing or producing venom; marked by deep ill will
spurn: a thing that encourages someone to do something; any sharply pointed projection; (verb) to incite or stimulate someone or something
definev: to state or explain precisely the nature, scope, or meaning of something
characteristicn: a typical feature or quality that can identify, tell apart, or describe something or somebody
evolutionaryadj: relating to or denoting how living things develop or change from earlier forms
bizarreadj: very strange or unusual
millenniumn: a span of 1000 years, or the 1000th anniversary (plural: millennia)
diversityn: the quality or fact of many different types of things or people being included in something; a range of different things or people
kingdomn: the country ruled by a king or queen