electrolytes
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C1 noun /ɪˈlɛk.trəʊ.laɪts/

electrolytes

Meaning
Minerals in body fluids that carry an electric charge and are essential for many bodily functions.
Example
Electrolytes help maintain proper fluid balance in the body.
C1 noun səˈlɪnɪti ɪnˈtruːʒən

salinity intrusion

Meaning
The movement of salt water into freshwater areas, typically affecting coastal regions.
Example
Salinity intrusion affects coastal regions.
B2 noun /səbˈmɪʃən/

submission

Meaning
the act of yielding to authority or presenting something for consideration
Example
Her submission of the report was appreciated by the manager.
C2 noun /pʌɡˈnæsɪti/

pugnacity

Meaning
A natural disposition to be combative or aggressive.
Example
The coach admired the player's pugnacity on the field.
B2 noun, verb /striːk/

streak

Meaning
a long, thin line or mark; to move very quickly in a specified direction
Example
Lightning streaked across the night sky.
C2 noun ˌsɜːkəmˈspekʃən

circumspection

Meaning
The quality of being wary and unwilling to take risks; prudence.
Example
His circumspection ensured no mistakes were made.
C2 noun /ˈɛpəlɛt/

epaulette

Meaning
A variant spelling of epaulet, also meaning a shoulder ornament, especially on military uniforms.
Example
The officer’s epaulette shone brightly under the sunlight.
B2 noun /ˈmɪd.deɪ/

Midday

Meaning
The middle of the day; twelve o'clock in the daytime; noon
Example
The sun is brightest at midday when it's directly overhead.
B2 noun /ˈsɪmfəni/

Symphony

Meaning
an elaborate musical composition for full orchestra, typically in four movements
Example
The orchestra performed Beethoven's Fifth Symphony.
B2 noun /bɪd/

Bid

Meaning
an offer to pay a certain amount for something; an attempt to obtain or achieve something
Example
She made a bid for the antique vase at the auction.
A2 adjective /ˈpɜːrsənl/

personal

Meaning
relating to a particular person rather than anyone else
Example
She shared some personal details about her family.
C1 noun, verb /spreɪn/

sprain

Meaning
an injury to a joint in which the ligaments are stretched or torn
Example
She sprained her ankle while running in the park.
C1 noun /kəˈmoʊʃən/

commotion

Meaning
A state of noisy confusion or disturbance.
Example
The sudden commotion in the market drew everyone's attention.
C1 adjective /ˈsʌl.ki/

Sulky

Meaning
bad-tempered and sullen; moody
Example
The child became sulky when he couldn't get his favorite toy.
C1 noun /ˈlɪŋɡwɪst/

linguist

Meaning
A person skilled in foreign languages or in the scientific study of language.
Example
She is a linguist who speaks six languages fluently.
C1 verb /ˈkrɪsən/

christen

Meaning
to give a name to someone at baptism or to name something officially
Example
They christened the ship after the queen.
B2 noun /ˈlɪt.ər.ə.si/

Literacy

Meaning
the ability to read and write; competence or knowledge in a specified area
Example
Adult literacy programs help people learn to read.
B2 adjective, adverb /ˈneɪʃənˌwaɪd/

nationwide

Meaning
existing or happening throughout an entire nation
Example
The campaign received nationwide support.
C2 adjective /rɪˈmiːdiəbl/

remediable

Meaning
capable of being corrected or cured
Example
The mistake was serious but still remediable.
C1 noun /dɪˌnʌnsiˈeɪʃən/

denunciation

Meaning
the public condemnation or accusation of someone or something
Example
The journalist's article was a strong denunciation of corruption.
C2 verb /ˈproʊtjuːbəreɪt/

protuberate

Meaning
To swell out or bulge.
Example
The roots began to protuberate from the ground.
C1 noun /peɪˈiː/

payee

Meaning
A person to whom money is paid or is to be paid.
Example
The payee must sign the check before cashing it.
C1 noun /ʃəˈmiːz/

Chemise

Meaning
a woman's loose-fitting undergarment or dress hanging straight from the shoulders
Example
The vintage chemise was made of delicate lace and silk.
C2 noun /ˌhæŋ.ər ˈɒn/

hanger-on

Meaning
a person who spends time with a powerful or famous person to gain benefits.
Example
The celebrity was always surrounded by hangers-on.
C1 verb /ˈkɒŋɡrɪɡeɪt/

congregate

Meaning
to gather together in a group; to assemble
Example
People congregate in the town square every evening.
C1 noun /ˌsæl.jʊˈteɪ.ʃən/

Salutation

Meaning
a greeting; an expression of goodwill
Example
The letter began with a formal salutation.
C1 adjective /ˈfɔːrθˌraɪt/

forthright

Meaning
Direct and honest in speech or behavior; straightforward.
Example
She was forthright in her criticism of the policy.
B2 adverb /ˈklɒkwaɪz/

Clockwise

Meaning
in the direction that clock hands move; in a circular direction from left to right
Example
Turn the valve clockwise to tighten it.
B1 verb /rɪd/

rid

Meaning
to remove or get rid of something
Example
I need to rid the house of all the clutter.
B1 adverb /əˈsaɪd/

Aside

Meaning
to one side; apart; away from the main part
Example
Please set your book aside and listen to me.
B2 verb /əˈbændən/

abandon

Meaning
to give up completely; to leave permanently
Example
They had to abandon their house due to flooding.
B2 noun /ˈkʌmbæk/

comeback

Meaning
A return to a former status or success after a period of decline.
Example
The singer made a remarkable comeback after years of silence.
C1 adjective /ˈɔːrəl/

aural

Meaning
Relating to the ear or the sense of hearing.
Example
The lecture was an aural experience as well as an intellectual one.
C1 noun/verb /tæk/

tack

Meaning
a small sharp nail; or to change direction in sailing or approach something differently
Example
She used a tack to pin the paper on the wall.
B1 verb /rɪˈɡɑːrd/

regard

Meaning
to consider or think of in a particular way; to look at
Example
She regards him as her best friend.
B2 adjective /ɪmˈprɒp.ər/

Improper

Meaning
inappropriate; incorrect; not suitable
Example
It would be improper to discuss personal matters in a business meeting.
B1 noun /stæf/

staff

Meaning
a group of employees working together in an organization
Example
The staff at the hospital are very helpful.
A1 verb /ˈvɪzɪt/

visit

Meaning
to go and see someone or somewhere; to pay a call
Example
We plan to visit the museum this weekend.
B2 noun /ˌæl.əˈɡeɪ.ʃən/

Allegation

Meaning
a claim that someone has done something wrong or illegal
Example
The allegation against him was proven false.
C1 adjective /ɪnˈsɛp(ə)rəbəl/

inseparable

Meaning
Unable to be separated or always together.
Example
The two friends have been inseparable since childhood.
B2 adverb /əˈproʊpriətli/

appropriately

Meaning
in a way that is suitable or proper for a particular situation
Example
She was dressed appropriately for the event.
C2 verb /aɪˈtɪnəˌreɪt/

itinerate

Meaning
To travel from place to place, usually for the purpose of work or preaching.
Example
The missionary itinerated throughout the region to spread the message.
C2 adjective /ˈsækərɪn/

saccharine

Meaning
Excessively sweet or sentimental.
Example
His saccharine smile seemed insincere.
C1 noun /ˈoʊ.vər spɪl/

Over-spill

Meaning
the overflow of liquid from a container; excess that cannot be contained
Example
The overspill from the river flooded nearby farms.
B1 noun/verb /ˈdɒkjʊmənt/

document

Meaning
Noun: A written, printed, or electronic record that provides information or evidence. Verb: To record information in written or electronic form.
Example
She carefully documented all the expenses of the trip.
B2 noun /əbˈdʒek.ʃən/

Objection

Meaning
an expression of disagreement or disapproval; a reason for disagreeing
Example
The lawyer raised an objection during the trial.
B2 adjective + noun əˈdæptɪv ˈfiːtʃərz

adaptive features

Meaning
Characteristics that help organisms adjust to their environment
Example
Plants' adaptive features help them grow in winter.
B2 noun ˌrɛvəˈluːʃən

revolution

Meaning
A forcible overthrow of a government or social order, in favor of a new system.
Example
The story is set during the French Revolution.
B1 noun /ˌkæl.kjəˈleɪ.ʃən/

Calculation

Meaning
a mathematical determination of the size or number of something
Example
His calculation of the total cost was accurate to the penny.
B2 adjective /ˈlɛŋθi/

lengthy

Meaning
long in duration or extent
Example
The meeting was lengthy, lasting over three hours.
B2 noun /ˈbiː.təl/

Beetle

Meaning
a hard-bodied insect with wing covers
Example
The black beetle scurried across the garden path.
A1 adjective /ˈreɪ.di.əʊ/

radio

Meaning
Relating to radio waves or broadcasting.
Example
FAST is the largest radio telescope in the world.
B2 noun, adjective /ˌpəʊstˈɡrædʒuət/

postgraduate

Meaning
A student who has completed a first degree and is studying for a further degree.
Example
She is doing postgraduate research in physics.
C1 verb /ˈtɑːtər/

totter

Meaning
To move unsteadily, as if about to fall; to be on the point of collapse.
Example
The old man tottered across the street with a cane.
B1 noun /pəˈpaɪə/

Papaya

Meaning
a large orange tropical fruit with sweet orange flesh and black seeds
Example
Papaya is rich in vitamins and very good for health.
C2 adjective /ˈhɛtərəˌdɒks/

heterodox

Meaning
not conforming with accepted or orthodox standards or beliefs
Example
The professor was known for his heterodox views on religion.
C1 adjective ˈɒk.sɪ.də.tɪv

oxidative

Meaning
Related to or caused by oxidation, especially cellular damage from free radicals.
Example
Excess stress can lead to oxidative damage in cells.
C1 noun /ˈmjʊr.əl/

Mural

Meaning
a painting or artwork applied directly on a wall or ceiling
Example
The artist painted a beautiful mural on the school wall.
B1 noun ɡrəʊθ

Growth

Meaning
The process of increasing in physical size, number, value, or strength.
Example
Economic growth improves living conditions.
C2 verb /ˈmæk.ɪ.neɪt/

machinate

Meaning
to engage in plots or schemes, usually for harmful or evil purposes
Example
The rebels tried to machinate against the king.
C2 noun /rɪˈpæst/

repast

Meaning
A meal or the food eaten during a meal.
Example
They enjoyed a delicious repast by the riverside.
C2 noun /ɒkˈteɪvoʊ/

octavo

Meaning
A size of book page resulting from folding a sheet of paper into eight leaves (sixteen pages).
Example
The old library contained rare octavo editions of Shakespeare.
B2 verb /ɪtʃ/

itch

Meaning
to feel an urge to scratch; to have a restless desire
Example
My skin itches from the mosquito bites.
C2 adjective /rɪˈfjuː.tə.bəl/

Refutable

Meaning
capable of being proven wrong or false; able to be disproved
Example
His theory was refutable because it could be tested experimentally.
C1 verb /ˈpleɪdʒəraɪz/

plagiarize

Meaning
to take someone else's work or ideas and present them as your own
Example
He was warned not to plagiarize his friend's essay.
B2 noun /ˈkʌvərɪdʒ/

coverage

Meaning
The extent or scope of something, such as insurance protection or media reporting.
Example
The news channel provided extensive coverage of the event.
C2 noun /ˈpɒliˌɑːrki/

polyarchy

Meaning
government by many people
Example
Polyarchy allows multiple parties to share power.
C1 noun /ˈsɛmbləns/

Semblance

Meaning
the outward appearance or apparent form of something, especially when the reality is different
Example
There was only a semblance of order in the chaotic office.
B2 noun /ˈbæŋkrʌpt/

Bankrupt

Meaning
a person unable to pay debts; having no money; completely lacking in something
Example
The company went bankrupt after years of poor financial management.
B2 noun ˈæsɪd reɪn

acid rain

Meaning
Rainfall made acidic by atmospheric pollution, especially from industrial emissions.
Example
Acid rain damages crops and buildings.
C1 noun /rɪˈvʌlʃən/

revulsion

Meaning
a strong feeling of disgust or repulsion
Example
She felt revulsion at the sight of the cruel act.
B1 noun /ˈempaɪər/

empire

Meaning
a group of countries or regions controlled by one ruler or government
Example
The Roman Empire lasted for centuries.
B2 verb, adjective /ˈfɒstər/

foster

Meaning
to encourage the development of something; to raise a child that is not one's own
Example
The program aims to foster creativity in young students.
B1 noun rɔː mətɪˈrɪəlz

raw materials

Meaning
The basic material from which a product is made.
Example
The factory imports raw materials for production.
C2 noun /ˈsɪbɪləns/

sibilance

Meaning
A hissing or hushing sound, especially in speech with 's' or 'sh'.
Example
The poet used sibilance to create a soft, hissing effect in the verse.
B2 noun /ˈraɪət/

Riot

Meaning
a violent disturbance of the peace by a crowd; an uncontrolled outburst
Example
The peaceful protest turned into a riot when violence broke out.
B2 noun /ˈɪntərfeɪs/

interface

Meaning
a point where two systems, subjects, or organizations meet and interact
Example
The user interface is designed to be intuitive and user-friendly.
C1 noun /ˈɔːtəkræt/

autocrat

Meaning
A ruler with absolute power.
Example
The autocrat controlled the country with an iron fist.
C1 adjective /ɪmˈpɛtʃ.u.əs/

impetuous

Meaning
Acting or done quickly and without thought or care; impulsive.
Example
His impetuous decision led to unexpected consequences.
C2 noun /ˌfɪziˈɑːɡrəfi/

physiography

Meaning
the study of the physical features of the earth's surface
Example
He specialized in physiography to understand the landscape of the region.
B1 noun/adjective /ˈmæksɪməm/

maximum

Meaning
the greatest or highest amount, value, or degree possible
Example
She scored the maximum marks in the exam.
C1 noun /æbˈstrækʃən/

abstraction

Meaning
the process of forming general ideas by removing specific details; an abstract concept or idea
Example
Abstraction allows complex ideas to be represented in a simplified form.
C2 adjective /kənˈvɜːrsənt/

conversant

Meaning
familiar with or knowledgeable about something
Example
She is conversant with the latest developments in technology.
B1 noun /ˈprəʊsesɪŋ/

processing

Meaning
the series of actions or steps taken to achieve a particular end, especially in data or food handling
Example
Data processing takes place in the server.
B2 noun ˈhæb.ɪt fɔːrˌmeɪ.ʃən

habit formation

Meaning
The process of creating a habit through regular practice and repetition.
Example
Habit formation requires consistency and discipline.
C2 verb /rɪˈtrɛntʃ/

retrench

Meaning
to reduce costs, spending, or staff to save resources
Example
The company had to retrench employees due to financial difficulties.
C2 noun /ˌdɪfəˈrɛnʃə/

differentia

Meaning
A distinguishing characteristic that sets one thing apart from another.
Example
The differentia of humans is their ability to reason abstractly.
B1 adjective /ˌʌnbɪˈliːvəbəl/

Unbelievable

Meaning
impossible to believe; extremely surprising or remarkable
Example
The magician's performance was absolutely unbelievable.
B2 noun fəˈtɪl.ɪ.ti

fertility

Meaning
The quality of being fertile; fruitfulness.
Example
Fertility of the soil is crucial for farming.
A2 noun/verb /ˈɪntrəst/ or /ˈɪntəˌrɛst/

interest

Meaning
A feeling of curiosity or concern about something; or money paid for the use of borrowed money.
Example
He showed great interest in learning new languages.
C2 verb, noun /ˈɡoʊld.brɪk/

goldbrick

Meaning
to avoid work or duty; a person who shirks responsibility
Example
He was accused of goldbricking while the rest of the team worked hard.
B2 noun /ˈliːf.lət/

Leaflet

Meaning
a printed sheet of paper containing information or advertising and usually distributed free
Example
She handed out leaflets about the environmental campaign.
C1 noun /sɪˈsɛʃən/

secession

Meaning
The action of formally withdrawing from membership of a federation or body.
Example
The secession of the southern states led to the Civil War.
A2 noun /piˈænoʊ/

Piano

Meaning
a large keyboard musical instrument with black and white keys that produces sound by striking strings with hammers
Example
The little girl practiced piano for one hour every day.
B1 adjective /ɪmˈpruːvd/

improved

Meaning
made better or enhanced in quality or condition
Example
Her health has significantly improved since last month.
C1 adjective /ˈsiː.di/

Seedy

Meaning
squalid and disreputable; shabby and run-down; full of seeds
Example
They avoided walking through the seedy part of town at night.
B2 noun /ˈsʌ.plɪ.mənt/

Supplement

Meaning
something that completes or adds to something else; a dietary product
Example
She takes vitamin supplements to maintain her health.
B1 adjective /ˈmæsɪv/

Massive

Meaning
extremely large; huge in size or amount
Example
The company made a massive profit this year.
C1 noun /pəˈrɛnθəsɪs/

parenthesis

Meaning
A pair of curved marks ( ) used to enclose words or numbers; also an interruption or digression in speech or writing.
Example
The explanation was given in a parenthesis within the text.
B1 adjective /ˈkriːmi/

creamy

Meaning
having a smooth, rich texture like cream
Example
She poured a creamy sauce over the pasta.
C1 noun /ˈsuːtər/

suitor

Meaning
a man who pursues a relationship with a woman, often with the intent to marry
Example
She had many suitors vying for her attention.
B2 noun ˈkɑː.bən

carbon

Meaning
The chemical element of atomic number 6, occurring as diamond, graphite, and charcoal.
Example
Carbon emissions must be controlled.
A2 noun /ˈpækɪdʒ/

package

Meaning
a container or wrapping in which something is packed
Example
He received a package in the mail.
C2 noun /ˌdɪspjuːˈteɪʃən/

disputation

Meaning
a formal debate or argument
Example
The disputation between the two scholars lasted for hours.
C2 noun /ˌpætrəˈnɪmɪk/

patronymic

Meaning
a name derived from the name of a father or ancestor
Example
In many cultures, surnames are patronymic in origin.
B1 noun /ˈlɪt.ər.ə.ʧər/

Literature

Meaning
written works, especially those considered of superior or lasting artistic merit; books and writings published on a particular subject
Example
She studied English literature at university.
A2 verb /əˈtrækt/

attract

Meaning
to cause someone to have interest or draw something towards
Example
The flowers attract bees with their bright colors.
C1 adjective /ˈɡruːəlɪŋ/

grueling

Meaning
Extremely tiring and demanding.
Example
The athletes faced a grueling training session.
B2 verb /səˈluːt/

salute

Meaning
to greet with respect; to honor
Example
The soldiers saluted their commanding officer.
C2 adjective /ɪˈlɪbərəl/

illiberal

Meaning
Opposed to liberal principles; restricting freedom of thought or behavior.
Example
The government was criticized for its illiberal policies.
B2 adverb /ˌnɛvəðəˈlɛs/

nevertheless

Meaning
in spite of that; however
Example
He was tired; nevertheless, he kept working.
C2 adjective /ˈmʌnid/

Moneyed

Meaning
having much money; wealthy; rich
Example
She comes from a moneyed family with extensive real estate holdings.
C1 adjective /ʌnˈkɛmpt/

unkempt

Meaning
Having an untidy or disheveled appearance.
Example
He looked unkempt after sleeping outdoors all night.
C2 noun /ˌtɛliˈɒlədʒi/

teleology

Meaning
the explanation of phenomena by the purpose they serve rather than by cause
Example
Aristotle is often associated with the concept of teleology in philosophy.
C2 noun /sɪlf/

sylph

Meaning
A mythical spirit of the air; also refers to a slender, graceful woman.
Example
She moved across the stage like a sylph, light and graceful.
B1 noun /ˌsɪvɪlaɪˈzeɪʃən/

civilization

Meaning
the stage of human social and cultural development and organization considered most advanced
Example
Ancient Egypt is known for its remarkable civilization.
C2 adjective /ˌdɪskəmˈbɑːbjuleɪtɪd/

discombobulated

Meaning
confused and disoriented; feeling unsettled
Example
She looked discombobulated after hearing the unexpected news.
C2 noun /ɪˌkwɪvəˈkeɪʃən/

equivocation

Meaning
The use of ambiguous language to conceal the truth or to avoid committing oneself.
Example
The politician’s equivocation frustrated voters who wanted a clear answer.
C1 verb /ɪɡˈzæspəˌreɪt/

exasperate

Meaning
to irritate or annoy intensely
Example
His constant complaints began to exasperate his coworkers.
B2 noun /ˈpæs.taɪm/

Pastime

Meaning
an activity done regularly for enjoyment; a hobby or recreational activity
Example
Reading books is her favorite pastime during weekends.
B2 noun prɛsˈtiːʒ

prestige

Meaning
Widespread respect and admiration felt for someone or something on the basis of a perception of their achievements or quality.
Example
The university has gained international prestige for its research.