English Vocabulary and Etymology(Week3)
Prefix, root, suffix
hydr-:water
hydrant:apparatus for drawing water from a street main
example: On every floor there is a fire hydrant.
hydrometer:an instrument for determining the specific gravity of a liquid and hence its strength
example: Check your specific gravity by putting the sanitizes hydrometer right in the container.
cf:thermometer:an instrument used for measuring temperature
vs. 
hydrogen:a chemical element that has no color or smell and that is the simplest, lightest,and most common element
example: Hydrogen and oxygen are gases.
de-:down, away from
decrease:to become smaller in size, amount, number, etc.
example: These changes will decrease our expenses.
depreciate:to cause something to have a lower price or value
example: These changes have greatly depreciated the value of the house.
deactivate:to make something no longer active or effective
example:If you don't wish to use a feature, you can deactivate it.
New Words
．alacrity:a quick and cheerful readiness to do something
example: She accepted the invitation with delighted alacrity.
．disdain:a feeling of strong dislike of someone or something you think doesn't deserve
respect
example: He regarded their proposal with disdain.
．octogenarian:a person who is between 80 and 90 years old
example: She is very active for an octogenarian.
．inexorable:not able to be stop or change
example: Our reform made an inexorable march of progress.
．pernicious: causing great harm or damage
example: She thinks television has a pernicious influence on our children.
．sally:a sudden attack in which a group of soldiers rush forward against an enemy
example: The men in the fort sallied at dawn.
．precocious: a child having or showing the qualities or abilities of an adult at an early age
example: She was a precocious child who could read before she went to school.
．quell:to end or stop something usually by using force
example: The police have been called into quell a minor disturbance.
Extra Information
Tuberculosis
Kleenex
Tampon
The History of English in Ten Minutes
．lexicographer:an author or editor of a dictionary
hydr-:water
hydrant:apparatus for drawing water from a street main
example: On every floor there is a fire hydrant.
hydrometer:an instrument for determining the specific gravity of a liquid and hence its strength
example: Check your specific gravity by putting the sanitizes hydrometer right in the container.
cf:thermometer:an instrument used for measuring temperature
vs. 
hydrogen:a chemical element that has no color or smell and that is the simplest, lightest,and most common element
example: Hydrogen and oxygen are gases.
de-:down, away from
decrease:to become smaller in size, amount, number, etc.
example: These changes will decrease our expenses.
depreciate:to cause something to have a lower price or value
example: These changes have greatly depreciated the value of the house.
deactivate:to make something no longer active or effective
example:If you don't wish to use a feature, you can deactivate it.
New Words
．alacrity:a quick and cheerful readiness to do something
example: She accepted the invitation with delighted alacrity.
．disdain:a feeling of strong dislike of someone or something you think doesn't deserve
respect
example: He regarded their proposal with disdain.
．octogenarian:a person who is between 80 and 90 years old
example: She is very active for an octogenarian.
．inexorable:not able to be stop or change
example: Our reform made an inexorable march of progress.
．pernicious: causing great harm or damage
example: She thinks television has a pernicious influence on our children.
．sally:a sudden attack in which a group of soldiers rush forward against an enemy
example: The men in the fort sallied at dawn.
．precocious: a child having or showing the qualities or abilities of an adult at an early age
example: She was a precocious child who could read before she went to school.
．quell:to end or stop something usually by using force
example: The police have been called into quell a minor disturbance.
Extra Information
Tuberculosis
Tuberculosis (TB) is an infectious disease caused by the bacterium Mycobacterium tuberculosis (MTB).Tuberculosis generally affects the lungs, but can also affect other parts of the body. Most infections do not have symptoms, known as latent tuberculosis.The classic symptoms of active TB are a chronic cough with blood-containing sputum, fever, night sweats, and weight loss.Tuberculosis is spread through the air when people who have active TB in their lungs cough, spit, speak, or sneeze.Tuberculosis prevention and control efforts rely primarily on the vaccination of infants and the detection and appropriate treatment of active cases. The World Health Organization has achieved some success with improved treatment regimens, and a small decrease in case numbers.
>>Chest X-ray of a person with advanced tuberculosis: Infection in both lungs is marked by white arrow-heads, and the formation of a cavity is marked by black arrows.
Kleenex
Kleenex is a brand name for a variety of paper-based products such as facial tissue, bathroom tissue, paper towels, tampons, and diapers. Often used as a genericized trademark, especially in the United States, the name Kleenex is a registered trademark of Kimberly-Clark Worldwide, Inc. Kleenex products are manufactured in 30 countries and sold in more than 170 countries. Such Kleenex brands include VIVA, Cottonelle and Huggie.
Tampon
A tampon is a mass of absorbent material, primarily used as a feminine hygiene product. Historically, the word "tampon" originated from the medieval French word "tampion", meaning a piece of cloth to stop a hole, a stamp, plug, or stopper.At present, tampons are designed to be easily inserted into the vagina during menstruation and absorb the menstrual flow. However, using tampons may be difficult or impossible for those with untreated vaginismus or an untreated imperforate hymen.
Pad/Sanitary napkin
A sanitary napkin, sanitary towel, sanitary pad, menstrual pad, or pad is an absorbent item worn by a woman while she is menstruating, while she is recovering from vaginal surgery, for lochia (post-birth bleeding), after an abortion, or in any other situation where it is necessary to absorb a flow of blood from the vagina.
The History of English in Ten Minutes
．lexicographer:an author or editor of a dictionary
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