dehydration
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B2 noun /ˌdiː.haɪˈdreɪʃən/

dehydration

Meaning
A condition in which the body or tissue lacks adequate water content.
Example
Dehydration can lead to fatigue and confusion.
B1 adjective /dɪˈmændɪŋ/

demanding

Meaning
requiring much effort, skill, or attention; difficult to satisfy
Example
The job is very demanding and requires long hours of work.
C1 adjective /dɪˈplɔːrəbl/

deplorable

Meaning
deserving strong condemnation; shockingly bad in quality
Example
The refugees were living in deplorable conditions.
C2 adjective /dɪˈdjuːsəbl/

deducible

Meaning
able to be deduced; possible to be inferred
Example
The solution is deducible from the data provided.
B2 noun /drɪl/

drill

Meaning
a tool or exercise used for making holes or practicing skills
Example
The students took part in a fire drill at school.
C1 noun ˌdɪm.ɪˈnjuː.ʃən

diminution

Meaning
A reduction in the size, extent, or importance of something; decrease.
Example
There has been a diminution in air pollution.
B1 noun /dɪˈmænd/

Demand

Meaning
an urgent request; the desire of consumers for goods or services
Example
The demand for organic food has increased significantly in recent years.
B2 adjective /dɪˈsɛptɪv/

deceptive

Meaning
Giving an appearance or impression different from the truth; misleading.
Example
Appearances can be deceptive.
B2 noun /ˈdɔː.weɪ/

doorway

Meaning
the space where a door opens into a room or building
Example
She stood in the doorway waiting for him to arrive.
C1 noun /ˈdæn.drʌf/

Dandruff

Meaning
small white or grey flakes of dead skin that form on the scalp and fall from the hair
Example
He used a special shampoo to treat his persistent dandruff problem.
B2 verb /ˌdɪskəˈnɛkt/

disconnect

Meaning
to detach or separate from a connection or source
Example
Please disconnect the charger from the power outlet.
A1 adjective /dɑːk/

Dark

Meaning
having little or no light; of a deep shade approaching black
Example
She prefers dark colors for her winter clothes.
B2 noun /doʊs/

dose

Meaning
a measured amount of a medicine or drug taken at one time
Example
The doctor prescribed one dose of the medicine every six hours.
C1 verb /dɪˈvɒlv/

devolve

Meaning
To pass power, responsibility, or duties to another person or group.
Example
The responsibility will devolve on the new manager.
B2 verb /dʌmp/

dump

Meaning
to drop or dispose of something carelessly; to end a relationship suddenly
Example
He dumped all the trash into the bin.
A2 preposition /dɪˈspaɪt/

despite

Meaning
Without being affected by; in spite of.
Example
He continued his work despite the difficulties.
B2 noun /ˈdiːmən/

demon

Meaning
an evil spirit or devil
Example
The story was about a demon who haunted the village.
B2 verb /ˌdɪsəˈpruːv/

disapprove

Meaning
to have a negative opinion about something; to consider something wrong or bad
Example
Many parents disapprove of smoking.
C1 adjective /dɪsˈpæʃənət/

dispassionate

Meaning
not influenced by strong emotion; impartial
Example
The judge remained dispassionate throughout the trial.
C2 adjective /ˌdaɪəˈlɛktɪkəl/

dialectical

Meaning
Relating to the logical discussion of ideas and opinions.
Example
She took a dialectical approach to solve the complex issue.
A1 verb /driːm/

dream

Meaning
to have thoughts and images in your mind while sleeping; to hope for
Example
I often dream about flying in the sky.
B2 noun /dɪˌtɜː.mɪˈneɪ.ʃən/

determination

Meaning
Firmness of purpose; the quality of being determined; resolve.
Example
His determination to succeed was unwavering.
B1 noun /ˈdaɪəɡræm/

diagram

Meaning
a simplified drawing that shows the structure, relationship, or process of something
Example
The teacher explained the system using a clear diagram.
C2 noun /ˌdɛrɪˈlɪkʃən/

dereliction

Meaning
the state of being abandoned; neglect of duty
Example
The officer was charged with dereliction of duty.
B2 verb /ˈdæzəl/

dazzle

Meaning
to impress deeply or blind with brilliance or skill
Example
The magician's tricks dazzled the audience.
C2 verb /ˌdɪsɪnˈfræntʃaɪz/

disenfranchise

Meaning
To deprive someone of the right to vote or other rights.
Example
The new law could disenfranchise thousands of voters.
C2 adjective /ˈdəʊ.lə.rəs/

dolorous

Meaning
Expressing great sorrow or distress.
Example
He spoke in a dolorous tone after the loss.
A1 noun /ˈdænsɪŋ/

dancing

Meaning
the activity of moving the body rhythmically to music
Example
They spent the evening dancing at the party.
C1 noun /ˌdɪs.ɪˈluː.ʒən.mənt/

disillusionment

Meaning
A feeling of disappointment resulting from the discovery that something is not as good as one believed it to be.
Example
Many people experience disillusionment after unrealistic expectations.
C1 phrase ˌdɪp.ləˈmæt.ɪk rɛz.əˈluː.ʃən

diplomatic resolution

Meaning
A peaceful solution to conflicts through negotiation and diplomatic channels.
Example
A diplomatic resolution is necessary for peace.
C2 verb /ˈdɛpɪleɪt/

depilate

Meaning
to remove hair from the skin, especially by mechanical or chemical means
Example
She decided to depilate her legs before the event.
B2 verb/noun /ˌdɪsrɪˈɡɑːrd/

disregard

Meaning
To ignore something; lack of consideration or respect for something.
Example
He disregarded the warning signs and kept driving.
A2 noun /dəˈrɛkʃən/ or /daɪˈrɛkʃən/

direction

Meaning
the course or path on which someone or something is moving; instructions on what to do
Example
He asked for directions to the train station.
C2 noun /ˈdɪfθɒŋ/

diphthong

Meaning
A complex vowel sound that begins with one vowel and glides into another within the same syllable.
Example
The word 'coin' contains a diphthong.
B2 noun daɪˈmen.ʃən

dimension

Meaning
An aspect or feature of a situation, problem, or thing; a measurable extent.
Example
Renewable projects add a new dimension to urban planning.
C1 noun ˌdɪdʒɪˈnɛəreɪʃən

degeneration

Meaning
The process of decline or deterioration in structure or function.
Example
The degeneration of brain cells leads to cognitive decline.
C1 noun /ˌdɪsəˈbiːdiəns/

disobedience

Meaning
failure or refusal to obey rules, laws, or authority
Example
The child's disobedience worried his parents.
B2 noun /dɪˈsep.ʃən/

Deception

Meaning
the action of deceiving someone; the state of being deceived
Example
The magician's deception amazed the audience with seemingly impossible tricks.
C2 noun /ˈdæl.i.əns/

Dalliance

Meaning
a casual romantic or sexual relationship; a brief involvement or experiment
Example
His dalliance with photography lasted only a few months before he lost interest.
B1 noun ˌdemənˈstreɪʃənz

demonstrations

Meaning
The action or process of showing the existence or truth of something by giving proof or evidence.
Example
Demonstrations occurred on March 11.
B2 verb /dwel/

dwell

Meaning
to live in a place; to think about something for a long time
Example
They dwell in a small cottage by the lake.
C2 adjective /dɪsˈkɒnsələt/

disconsolate

Meaning
very unhappy and unable to be comforted
Example
She was disconsolate after hearing the bad news.
C2 noun /doʊˈniː/

donee

Meaning
A person who receives a gift or donation.
Example
The scholarship fund’s donee expressed heartfelt gratitude.
B1 noun /ˈdaɪ.mənd/

Diamond

Meaning
a precious stone that is extremely hard and brilliant when cut
Example
She wore a diamond ring on her finger.
C2 verb /dɪˈlæpɪdeɪt/

dilapidate

Meaning
To cause something, especially a building, to fall into ruin or disrepair.
Example
The abandoned house began to dilapidate over the years.
C1 noun, adjective /dɪˈrɪvətɪv/

derivative

Meaning
Something that is based on another source; in math, a measure of how a function changes.
Example
The film was criticized for being too derivative of earlier works.
B2 noun dɪˈstrækʃən

distraction

Meaning
Something that prevents concentration or takes attention away from something else.
Example
Distraction during study time can hinder learning.
B1 verb /dɪˈnaɪ/

deny

Meaning
to refuse to accept or admit something; to declare something untrue
Example
He denied stealing the money.
C1 adjective /ˈdɪzməl/

Dismal

Meaning
gloomy; depressing; causing sadness or despair
Example
The weather was dismal with heavy rain and dark clouds.
C1 verb /dɪˈtrækt/

detract

Meaning
To reduce or take away the worth or value of something.
Example
His rude behavior will detract from his good reputation.
B2 noun dɪˈveləpɪŋ ˈriːdʒənz

developing regions

Meaning
Areas or countries that are in the process of economic growth and development
Example
Pollution affects developing regions the most.
C1 noun /daɪˈsɛkʃən/

dissection

Meaning
the act of cutting apart or analyzing something in detail, especially a body or structure
Example
The dissection of the specimen revealed important details about its structure.
A2 noun /ˈdɑrk.nəs/

Darkness

Meaning
the partial or total absence of light; wickedness or evil; ignorance or lack of knowledge
Example
The power outage plunged the entire city into darkness.
B2 adjective /dɪˈstrɛst/

distressed

Meaning
feeling or showing extreme anxiety, sorrow, or pain
Example
She looked distressed after hearing the bad news.
C1 noun /ˈdɑːrwɪnɪzəm/

darwinism

Meaning
the theory of biological evolution developed by Charles Darwin, emphasizing natural selection
Example
Darwinism revolutionized the way scientists understood the origin of species.
B2 noun /dɛk/

deck

Meaning
A flat surface or platform, often on a ship or building.
Example
We enjoyed the sunset from the upper deck of the ferry.
C2 verb /ˌdɪskəmˈbɑːbjuleɪt/

discombobulate

Meaning
to confuse or disconcert; to upset the normal order
Example
The sudden question seemed to discombobulate him.
B1 verb /ˈdɪfər/

differ

Meaning
to be unlike or distinct from something else
Example
Opinions differ on this issue.
A2 adjective /duː/

Due

Meaning
owed as a debt; expected at a certain time; scheduled
Example
The assignment is due tomorrow.
B1 verb /dɪˈfiːt/

Defeat

Meaning
to win a victory over; to overcome in battle or competition
Example
The army managed to defeat the enemy forces.
C1 verb /ˈdræm.ə.taɪz/

dramatize

Meaning
to present a story in a dramatic way, or to exaggerate something
Example
The novel was dramatized into a popular TV series.
C1 adjective /dɪˈreɪndʒd/

deranged

Meaning
mentally disturbed or insane; behaving irrationally
Example
The deranged man shouted nonsense in the street.
A1 noun /dæd/

dad

Meaning
an informal term for father
Example
My dad taught me how to ride a bike.
C1 verb /dəˈmɛstɪkeɪt/

domesticate

Meaning
to tame an animal for use by humans; to adapt something for domestic use
Example
Humans domesticated dogs thousands of years ago.
B1 noun /dɪˈstrʌk.ʃən/

Destruction

Meaning
the action or process of causing damage to something so that it no longer exists
Example
The earthquake caused widespread destruction throughout the entire city.
C1 noun ˌdep.əˈzɪʃ.ən

deposition

Meaning
The action of depositing something; the laying down of matter by a natural process.
Example
River deposition leads to the formation of new landmasses.
C2 verb /diːˈpɒpjʊˌleɪt/

depopulate

Meaning
To reduce the number of people living in a place.
Example
The war threatened to depopulate the once-thriving town.
C1 adjective /diːˈsɛntrəlaɪzd/

decentralized

Meaning
Controlled by several local offices or authorities rather than one single one.
Example
The decentralized system allowed for more control at local levels.
C1 noun /dɪˈkriː/

Decree

Meaning
an official order issued by a legal authority; a judicial decision or edict
Example
The king issued a decree that all citizens must pay additional taxes.
C1 noun /ˈduːmz.deɪ/

Doomsday

Meaning
the last day of the world's existence; a time of catastrophic destruction
Example
The preacher spoke about doomsday and the importance of preparing spiritually.
C1 noun /drɑːft/ (UK), /dræft/ (US)

draught

Meaning
a current of cool air in a room or another confined space; also a portion of liquid, especially beer, served from a barrel or cask
Example
She closed the window to keep out the cold draught.
C1 adjective /ˈdɒdʒi/

Dodgy

Meaning
suspicious; questionable; unreliable; risky or dangerous
Example
That deal sounds dodgy to me.
C2 noun /ˈdɛkəˌɡɒn/

decagon

Meaning
A polygon with ten sides and ten angles.
Example
The geometry teacher drew a perfect decagon on the board.
C1 noun /ˌdiː.kɒmpəˈzɪʃən/

decomposition

Meaning
the process of decaying or breaking down into simpler parts
Example
The decomposition of leaves enriches the soil.
C2 noun /dɪˈprævɪti/

depravity

Meaning
moral corruption; wickedness
Example
The film portrays the moral depravity of a corrupt society.
B2 noun ˈdɪdʒɪtəl ˈfɔːrmæt

Digital Format

Meaning
A format in which information is stored as electronic data.
Example
A digital format family tree can be shared online.
C1 adjective /ˌdɪsɪnˈdʒɛnjʊəs/

disingenuous

Meaning
not candid or sincere; giving a false appearance of honesty or openness
Example
She gave a disingenuous excuse for missing the meeting.
C1 noun /dɪsˈsɜːrvɪs/

disservice

Meaning
A harmful action; something that does damage rather than help.
Example
Spreading false information is a disservice to the community.
A2 noun /ˈdʌst.bɪn/

Dustbin

Meaning
a container for holding waste or garbage before disposal
Example
Please throw the paper into the dustbin after use.
C2 noun /ˈdɪktəm/

dictum

Meaning
A formal pronouncement, authoritative statement, or maxim.
Example
The judge’s dictum clarified the principle of equality before the law.
A1 noun /dɪˈsɛmbər/

december

Meaning
the twelfth and last month of the year in the Gregorian calendar
Example
December is usually cold in many countries.
C1 adjective /dɪˈspɒndənt/

despondent

Meaning
feeling or showing deep hopelessness or discouragement
Example
She felt despondent after losing her job.
B2 noun /ˌdaɪəˈbiːtiːz/

diabetes

Meaning
a medical condition in which the body cannot properly control the level of sugar in the blood
Example
He was diagnosed with type 2 diabetes last year.
C2 adjective /dɪsˈkʌmfɪtɪŋ/

discomfiting

Meaning
Causing unease, embarrassment, or discomfort.
Example
His discomfiting questions made everyone shift uncomfortably in their seats.
C1 verb /dɪˈsɛkt/

dissect

Meaning
to cut apart an animal, plant, or other organism to study its internal parts; to analyze something in detail
Example
In biology class, students had to dissect a frog to learn about its anatomy.
A1 verb /duː/

do

Meaning
to perform an action; to carry out
Example
I do my homework every evening.
B2 noun /dɪsˈkʌmfərt/

discomfort

Meaning
A feeling of slight pain, unease, or awkwardness.
Example
She shifted in her chair due to discomfort in her back.
C1 noun /ˈderˌdevəl/

daredevil

Meaning
A person who enjoys doing dangerous or risky things.
Example
The stunt was performed by a famous daredevil.
C1 verb /daɪˈvɛst/

divest

Meaning
to strip away possessions, rights, or assets; to rid oneself of
Example
The company decided to divest its unprofitable division.
C1 verb /dɪˈraɪd/

deride

Meaning
to mock or ridicule someone or something
Example
The critics derided the new movie for its poor script.
A2 noun dɪˈskrɪpʃən

description

Meaning
A spoken or written account of a person, object, or event.
Example
His description was vivid.
C1 noun /dɪsˈɒn.ər/

Dishonour

Meaning
a state of shame or disgrace; lack of honor or integrity; failure to fulfill obligations
Example
Breaking his promise brought dishonour to his name and family legacy.
C2 noun /ˈdɛntɪfrɪs/

dentifrice

Meaning
a substance such as powder, paste, or liquid used to clean teeth
Example
He bought a new herbal dentifrice from the pharmacy.
C2 verb /ˈdɪðər/

dither

Meaning
to be indecisive or unable to make a decision
Example
He dithered for hours before choosing a restaurant.
C2 noun /ˌdɪsrɪˈpjuːt/

disrepute

Meaning
the state of being held in low esteem or having a bad reputation
Example
The scandal brought the politician into disrepute.
C1 noun /dɪˈsaɪ.pəl/

Disciple

Meaning
a follower and student of a teacher, leader, or philosopher; devoted follower
Example
The famous philosopher had many disciples who spread his teachings worldwide.
C2 verb /dɪˈkæmp/

decamp

Meaning
To depart suddenly or secretly, often to avoid trouble or escape.
Example
The thief decamped before the police arrived.
C2 noun /ˌdɛkəˈsɪləbəl/

decasyllable

Meaning
A line of verse with ten syllables.
Example
The poet often wrote in decasyllable form.
B2 noun /dɪˈnaɪ.əl/

Denial

Meaning
the action of declaring something to be untrue; refusal to acknowledge something
Example
His denial of involvement in the scandal was met with skepticism.
B1 noun ˌdɪsədˈvæntɪdʒ

disadvantage

Meaning
An unfavorable circumstance or condition that reduces the chances of success or effectiveness.
Example
Urdu's dominance placed Bengalis at a disadvantage.
C1 noun /ˈdek.ə.dəns/

decadence

Meaning
Moral or cultural decline characterized by excessive indulgence in pleasure or luxury.
Example
The novel describes the decadence of the wealthy elite.
B2 verb /doʊz/

doze

Meaning
To sleep lightly for a short time.
Example
He dozed off while reading the book.
B2 noun /dɪˈstɪŋk.ʃən/

Distinction

Meaning
a difference or contrast between similar things; excellence that sets someone apart; honor or recognition
Example
She graduated with distinction, earning the highest honors in her class.
B2 noun draʊt

drought

Meaning
A prolonged period of abnormally low rainfall; a shortage of water.
Example
Drought impacts crop growth significantly.
B2 adjective /dɛns/

dense

Meaning
Closely compacted in substance; having parts crowded together.
Example
The forest was so dense that little sunlight reached the ground.
B2 verb /dɪˈmɒlɪʃ/

demolish

Meaning
to destroy completely, especially a building or structure
Example
The city decided to demolish the old stadium to build a new one.
B1 adjective /dɪsˈɡʌstɪŋ/

disgusting

Meaning
extremely unpleasant or offensive; causing strong dislike or revulsion
Example
The smell coming from the trash can was absolutely disgusting.
C2 noun /daɪn/

dyne

Meaning
A unit of force in the centimeter-gram-second (cgs) system equal to 10⁻⁵ newtons.
Example
The physicist measured the force in dynes.
C1 noun /ˌdɪstɪˈleɪʃən/

distillation

Meaning
The process of purifying a liquid by heating and cooling; the extraction of the essential meaning.
Example
Distillation is commonly used to produce alcoholic beverages.
A2 noun /ˈdɒŋ.ki/

Donkey

Meaning
a domesticated animal related to the horse, with long ears and a braying call
Example
The donkey carried heavy bags up the mountain.
C1 verb /ˌdɪsəˈsɛmbəl/

disassemble

Meaning
To take apart something into its separate pieces.
Example
He had to disassemble the computer to repair it.
C2 adjective /ˈdɔːrsəl/

dorsal

Meaning
Relating to the back or upper side of an animal or body part.
Example
Sharks have a prominent dorsal fin.
B1 verb /ˈdɛmənˌstreɪt/

demonstrate

Meaning
to clearly show or prove something through evidence, explanation, or action
Example
The teacher demonstrated the experiment to the class.
B2 noun /dɪˈsper/

Despair

Meaning
the complete loss or absence of hope; a state of feeling hopeless
Example
After losing his job, he fell into despair and couldn't see any way forward.
C1 noun /ˌdiː.viˈeɪ.ʃən/

Deviation

Meaning
the action of departing from an established course; a departure from usual standards
Example
Any deviation from the established procedure must be reported immediately.
C2 adjective /ˈdaʊti/

doughty

Meaning
brave, valiant, courageous
Example
The doughty soldier never backed down from a challenge.
C2 adjective /dɪˈstɛnsəbl̩/

distensible

Meaning
Capable of being stretched or expanded.
Example
The stomach is a distensible organ that can expand after eating.
C1 noun /ˈdaʊri/

dowry

Meaning
Property or money brought by a bride to her husband at marriage.
Example
The dowry tradition is still followed in some cultures.
C2 verb /dɪsˈbɑːr/

disbar

Meaning
to officially remove a lawyer from the legal profession
Example
The corrupt lawyer was disbarred for unethical conduct.
B1 noun /ˈdeə.ri/

Dairy

Meaning
a building or farm where milk is produced; products made from milk; a shop selling milk and milk products
Example
The local dairy provides fresh milk and cheese to the entire neighborhood.
B1 adjective /drəˈmæt.ɪk/

Dramatic

Meaning
relating to drama; sudden and striking; exciting and impressive
Example
The dramatic sunset painted the sky in brilliant colors.