diagnose
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B2 verb /ˌdaɪəɡˈnoʊz/

diagnose

Meaning
To identify a disease, condition, or problem by examining symptoms.
Example
The doctor diagnosed him with pneumonia.
C2 verb /dɪˈbɔːtʃ/

debauch

Meaning
to corrupt morally; to lead into excessive indulgence in sensual pleasures
Example
The novel shows how wealth can debauch a person's character.
B1 noun /ˌdɛfɪˈnɪʃən/

definition

Meaning
a statement that explains the meaning of a word or concept
Example
The dictionary gives a clear definition of the word.
A2 noun dɪˈskʌʃ.ənz

discussions

Meaning
The action or process of talking about something in order to reach a decision or to exchange ideas.
Example
Discussions promote collaboration.
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.
A2 noun /ˈdrʌɡˌstɔːr/

drugstore

Meaning
A retail store that sells medicines, health-related products, and sometimes cosmetics or snacks.
Example
I stopped by the drugstore to buy some cold medicine.
B2 noun /ˈden.sə.ti/

Density

Meaning
the degree of compactness of a substance; the quantity of something per unit area
Example
The density of population in the city center is extremely high.
C1 noun /daɪˈvɜː.dʒəns/

divergence

Meaning
The process or state of diverging; a difference or deviation between two or more things.
Example
The divergence in their opinions led to a heated debate.
B2 adjective /dɪˈvoʊtɪd/

devoted

Meaning
Very loving, loyal, or dedicated.
Example
She is a devoted mother who always puts her children first.
C1 verb /daɪˈleɪt/

dilate

Meaning
To make wider, larger, or more open.
Example
The doctor used drops to dilate the patient's pupils.
C1 noun /dɪˌnɒmɪˈneɪʃən/

denomination

Meaning
a recognized autonomous branch of the Christian Church; a unit of value or currency
Example
The church belongs to a Protestant denomination.
A1 noun /dɔːɡ/

Dog

Meaning
a domesticated carnivorous mammal that is typically kept as a pet or for work
Example
The loyal dog waited patiently for its owner to return home.
C1 verb /daɪˈvɜːrdʒ/

diverge

Meaning
to separate and go in different directions; to differ
Example
The two paths diverge at the fork in the road.
C1 noun /daɪˈvɜː.ʃən/

Diversion

Meaning
the action of turning something aside from its course; an activity that diverts the mind
Example
The road closure forced a diversion through the countryside for all travelers.
C1 verb /dɪsˈpleɪs/

displace

Meaning
to force someone or something out of their usual or original position; to replace or substitute
Example
The new technology will displace many traditional manufacturing jobs.
C2 noun /ˈdɛnɪzən/

denizen

Meaning
an inhabitant or resident of a particular place
Example
The forest is home to many nocturnal denizens.
C2 noun /ˌdɪsɪnklɪˈneɪʃən/

disinclination

Meaning
a lack of willingness or desire to do something
Example
She showed a clear disinclination to join the meeting.
A1 noun /dæd/

dad

Meaning
an informal term for father
Example
My dad taught me how to ride a bike.
B2 adjective dɪsˈrʌp.tɪv

disruptive

Meaning
Causing or tending to cause disruption.
Example
Deforestation has a disruptive effect on wildlife.
B2 verb /dɪˈtekt/

detect

Meaning
to discover or identify the presence or existence of something; to notice something that is not immediately obvious
Example
The security system can detect movement in the building.
C1 adjective ˈdɔːn.tɪŋ

daunting

Meaning
Something that seems intimidating or challenging.
Example
The task seemed daunting, but she completed it successfully.
C1 verb /dɪˈspɛl/

dispel

Meaning
to make a doubt, feeling, or belief disappear
Example
The teacher's explanation dispelled the students' confusion.
A2 adjective, noun /dɛd/

dead

Meaning
No longer alive; the end of life.
Example
The old tree is completely dead.
C2 verb /dɪˈmɜːr/

demur

Meaning
to raise doubts, objections, or show reluctance
Example
She agreed to help without demur.
B1 noun /ˈdɛv.əl/

devil

Meaning
An evil spirit or supernatural being often regarded as the embodiment of wickedness and harm.
Example
The story warned children about making deals with the devil.
C1 noun /ˈdɪsənˌtɛri/

dysentery

Meaning
An infection of the intestines resulting in severe diarrhea with blood and mucus.
Example
Many soldiers suffered from dysentery during the war.
B1 noun /dɪˈvɪʒən/

division

Meaning
the action of separating something into parts; or a large administrative unit
Example
The company has a separate division for research and development.
C1 noun /djuːn/

dune

Meaning
A hill or ridge of sand formed by the wind, usually found in deserts or near beaches.
Example
The children played on the sand dune by the beach.
C2 noun /ˌdaɪələˈtɪʃən/

dialectician

Meaning
A person skilled in dialectic or logical argument.
Example
Socrates is often considered the greatest dialectician in history.
C1 verb /ˈdæb.əl/

dabble

Meaning
To take part in an activity in a casual or superficial way.
Example
He dabbled in painting during his college days.
B2 verb /draʊn/

drown

Meaning
to die or cause to die by being submerged in and inhaling water
Example
He nearly drowned while swimming in the river.
C2 verb /ˌdɪsəˈbjuːz/

disabuse

Meaning
To free someone from a false belief or misconception.
Example
The teacher tried to disabuse the students of their misunderstanding.
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.
C1 noun /ˌdep.rɪˈveɪ.ʃən/

deprivation

Meaning
The damaging lack of material benefits considered to be basic necessities in a society.
Example
Sleep deprivation affects cognitive function.
A2 noun /ˈdaɪəri/

diary

Meaning
a book in which one keeps a daily record of events and experiences
Example
She wrote about her day in her diary before going to bed.
C2 noun /dɛnˈdrɒlədʒi/

dendrology

Meaning
the scientific study of trees and woody plants
Example
He is studying dendrology at the university.
C1 noun /ˈdɪs.ə.nəns/

dissonance

Meaning
Disagreement, lack of harmony, conflict between ideas or beliefs.
Example
The cultural dissonance created misunderstandings.
B2 noun /ˌdaɪəɡˈnoʊsɪs/

diagnosis

Meaning
The identification of a disease, condition, or problem through examination of symptoms.
Example
The diagnosis confirmed that she had diabetes.
C2 verb /ˌdɪsɪnˈhɛrɪt/

disinherit

Meaning
to deprive someone, especially a child, of inheritance or right to property
Example
The father threatened to disinherit his son for his reckless actions.
B2 adjective /dɪˈvaɪn/

Divine

Meaning
heavenly; sacred; godlike; relating to God or a deity
Example
The divine beauty of the sunset took their breath away.
C1 noun /ˈdaɪəˌlɛkt/

dialect

Meaning
A particular form of a language spoken in a specific region or by a specific group.
Example
He speaks a dialect of Bengali that is common in rural areas.
C2 noun /ˌdiːnəʊˈteɪʃən/

denotation

Meaning
The literal or primary meaning of a word, in contrast to the feelings or ideas that the word suggests.
Example
The denotation of the word 'rose' is a type of flower.
C1 noun /ˈdʊr.i.ən/

Durian

Meaning
a large spiky tropical fruit known for its strong smell and creamy custard-like flesh
Example
Durian is known as the king of fruits in Southeast Asia despite its pungent odor.
B2 noun /daɪˈmen.ʃənz/

dimensions

Meaning
Aspects or features of a situation, problem, or thing.
Example
New dimensions of space exploration are being uncovered.
C1 noun /deɪˈtɑːnt/

detente

Meaning
the easing of hostility or strained relations, especially between countries
Example
The two nations worked toward detente after decades of conflict.
A2 adjective /duː/

Due

Meaning
owed as a debt; expected at a certain time; scheduled
Example
The assignment is due tomorrow.
C2 verb /ˈdiːɪfaɪ/

deify

Meaning
to treat or worship someone or something as a god
Example
Some fans deify their favorite celebrities.
B1 verb /dɪsˈtrɪbjuːt/

distribute

Meaning
to give out or spread something among several people or places
Example
The teacher will distribute the test papers.
A2 adjective/adverb /ˈdeɪli/

daily

Meaning
happening every day
Example
She reads the newspaper daily.
C1 adjective /dɪˈspɪrɪtɪd/

dispirited

Meaning
Having lost enthusiasm, hope, or confidence; dejected.
Example
After losing the match, the team looked dispirited.
B2 verb /dɪsˈmɪs/

dismiss

Meaning
to remove someone from a job or position; to decide something is not important
Example
The manager dismissed the employee for being late too often.
B2 noun /dɪsˈpoʊzl/

disposal

Meaning
the action or process of getting rid of something
Example
The disposal of waste is crucial for maintaining a clean environment.
C1 adjective /ˈdaʊn.kæst/

downcast

Meaning
feeling sad, dejected, or with lowered eyes
Example
He looked downcast after hearing the bad news.
A2 noun /ˈdeɪ.tə/

Data

Meaning
facts and statistics collected together for reference or analysis; information in digital form
Example
Scientists analyzed the data from thousands of experiments to reach their conclusion.
B2 noun /dɪsˈkloʊʒər/

disclosure

Meaning
the action of making something known or public
Example
The disclosure of the company's financial status was delayed.
C2 noun /dɪˈtraɪtəs/

detritus

Meaning
Waste or debris of any kind; fragments left from destruction or decay.
Example
The riverbank was covered with detritus after the flood.
B2 adjective /ˈdɛlɪkət/

delicate

Meaning
Easily broken or damaged; requiring careful handling.
Example
The vase is very delicate, so handle it with care.
C2 adjective /ˈdoʊlfəl/

Doleful

Meaning
sorrowful; mournful; expressing grief or sadness
Example
She gave him a doleful look when he left.
B2 noun /daɪm/

dime

Meaning
a small coin, especially a U.S. coin worth ten cents
Example
He gave me a dime for the phone call.
C2 verb /ˈdɛsɪkeɪt/

desiccate

Meaning
to dry up completely or remove the moisture from something
Example
The hot sun can quickly desiccate plants in the desert.
C2 verb /dɪˈfreɪ/

defray

Meaning
to provide money to pay the costs of something
Example
The grant will help defray the cost of education.
C2 adjective /ˌdɪskəmˈbɑːbjuleɪtɪd/

discombobulated

Meaning
confused and disoriented; feeling unsettled
Example
She looked discombobulated after hearing the unexpected news.
B2 verb /dɪsˈkloʊz/

disclose

Meaning
to reveal or make information known; to expose
Example
The company must disclose all financial information.
C1 noun /diːˈkrɪp.ʃən/

decryption

Meaning
The process of converting encrypted data back into its original form so it can be understood.
Example
Hackers attempted decryption of classified data.
C2 noun /ˌdɛprɪˈdeɪʃən/

depredation

Meaning
An act of attacking or plundering; damage caused by such acts.
Example
The villagers feared the depredation of wild animals at night.
A2 adjective /diːp/

deep

Meaning
extending far down from the top or surface; profound or intense
Example
The lake is very deep in the middle.
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.
B2 adjective /ˈdjʊərəbəl/

Durable

Meaning
able to withstand wear, pressure, or damage; lasting; strong
Example
This durable fabric will last for many years.
B2 noun /ˌdɪs.əˈbɪl.ə.ti/

Disability

Meaning
a physical or mental condition that limits a person's movements, senses, or activities
Example
Despite his physical disability, he became a successful athlete in wheelchair racing.
B2 adjective /dʌm/

Dumb

Meaning
unable to speak; silent; lacking intelligence; stupid
Example
She remained dumb during the entire meeting.
B2 noun /dɪsˈtrɛs/

distress

Meaning
extreme anxiety, sorrow, or pain
Example
He felt a deep sense of distress when he heard the bad news.
C2 noun /dɪsˈjuːnjən/

disunion

Meaning
the state of being separated or not united
Example
Civil wars often result from national disunion.
C2 verb /drəˈɡuːn/

dragoon

Meaning
to force someone to do something through coercion or intimidation
Example
The manager tried to dragoon the team into working overtime.
C1 verb /dɪsˈkʌlər/

discolor

Meaning
to change color, especially in a way that spoils the original appearance
Example
The fabric began to discolor after being left in the sun.
C2 adjective /dɪsˈkɒnsələt/

disconsolate

Meaning
very unhappy and unable to be comforted
Example
She was disconsolate after hearing the bad news.
C1 noun ˌdɪs.æmˌbɪɡ.juˈeɪ.ʃən

disambiguation

Meaning
The removal of ambiguity by making something clear and unambiguous.
Example
The AI system applies disambiguation to refine text understanding.
B2 noun dɪˈplɔɪmənt

deployment

Meaning
The action of bringing resources into effective action.
Example
The deployment of the new software was completed successfully.
C2 verb /dɪsˈteɪn/

distain

Meaning
to treat with scorn or contempt (archaic form of disdain)
Example
He would never distain those who had less fortune than him.
C1 noun ˌdiː.sen.trə.laɪˈzeɪ.ʃən

decentralization

Meaning
The transfer of authority from central to local government.
Example
Decentralization promotes regional autonomy.
B2 noun /dɒk/

dock

Meaning
a structure where ships are loaded, unloaded, or repaired
Example
The ship stayed at the dock for two days.
A2 noun /dɪˈsɪʒənz/

decisions

Meaning
A conclusion or resolution reached after consideration; the action or process of deciding something.
Example
Making the right decisions in time was key to the project's success.
C2 noun /daɪˈvɛstɪtʃər/

divestiture

Meaning
the action of selling off or disposing of business interests or assets
Example
The divestiture of the subsidiary was completed last year.
B2 noun /dɪsˈmɪsl̩/

dismissal

Meaning
the act of removing someone from their job; the act of treating something as unimportant
Example
His unfair dismissal led to a lawsuit against the company.
C1 noun ˌdɛɡrəˈdeɪʃən

degradation

Meaning
The condition or process of degrading or being degraded.
Example
Soil degradation due to overuse is a growing issue.
C1 noun /ˌdɪs.əˈreɪ/

disarray

Meaning
A state of disorganization or untidiness; confusion or disorder.
Example
His desk was in complete disarray.
A1 noun /ˈdɒlər/

dollar

Meaning
The basic monetary unit of the United States and some other countries
Example
I need five dollars to buy this book.
C1 verb dɪˈsɜːn

discern

Meaning
To perceive or recognize something; to distinguish with difficulty by sight or with the other senses.
Example
He could barely discern the distant figure in the fog.
B1 verb /dɪˈleɪ/

delay

Meaning
to make something happen later than planned
Example
The flight was delayed due to bad weather.
B2 verb /dɪˈpraɪv/

deprive

Meaning
to take something away from someone, or prevent them from having it
Example
The new law may deprive people of their rights.
C2 noun /ˈdɛvɪlri/

devilry

Meaning
Wicked or cruel behavior; mischievous actions.
Example
The children were full of devilry on Halloween night.
B2 adverb /ˈden.sli/

densely

Meaning
In a closely compacted or crowded manner.
Example
The area is densely covered with trees.
C2 adjective /daɪˈæfənəs/

diaphanous

Meaning
Light, delicate, and translucent.
Example
She wore a diaphanous dress that shimmered in the sunlight.
B1 verb /ˈdekəreɪt/

decorate

Meaning
to make something look more attractive by adding ornaments
Example
We will decorate the room for the party.
C1 adjective /ˈdaɪ.si/

dicey

Meaning
Risky or unpredictable; potentially dangerous.
Example
Investing in that company looks pretty dicey right now.
A2 adjective /dɪˈlɪʃəs/

delicious

Meaning
having a very pleasant taste or smell
Example
The cake was so delicious that everyone asked for a second slice.
B2 noun /dɪsˈɡʌst/

Disgust

Meaning
a feeling of revulsion or strong disapproval aroused by something unpleasant
Example
She expressed her disgust at the politician's corrupt behavior openly.
A2 verb /ˌdɪsəˈɡriː/

disagree

Meaning
to have a different opinion; to not agree
Example
I disagree with your assessment of the situation.
C1 adjective draʊt rɪˈzɪs.tənt

drought-resistant

Meaning
Able to survive and grow despite limited water availability or drought conditions.
Example
Drought-resistant crops can survive in arid conditions.
B2 noun /ˈdjuːəʊ/

duo

Meaning
a pair of people or things, especially in music or entertainment
Example
The musical duo performed their latest hit at the concert.
A2 noun /ˈdaɪnɪŋ/

dining

Meaning
the act of eating a meal, especially in a formal setting
Example
We enjoyed fine dining at the new restaurant.
B1 verb /dɪp/

dip

Meaning
to put something quickly into a liquid and take it out again
Example
She dipped her bread into the soup.
C1 verb /dɪˈsweɪd/

dissuade

Meaning
To persuade someone not to do something.
Example
She tried to dissuade him from quitting his job.
C2 adjective /ˈdɛdˌpæn/

deadpan

Meaning
Deliberately impassive or expressionless in manner.
Example
She delivered the joke in a completely deadpan voice.
A2 verb /daɪ/

die

Meaning
to stop living; to cease to exist
Example
The flowers will die without water.
B2 verb /ˈdæzəl/

dazzle

Meaning
to impress deeply or blind with brilliance or skill
Example
The magician's tricks dazzled the audience.
C1 verb /dɔːnt/

daunt

Meaning
to make someone feel intimidated, discouraged, or less confident
Example
The steep climb did not daunt the experienced hikers.
B2 adjective /dɪˈzæs.trəs/

Disastrous

Meaning
extremely bad or unsuccessful; causing great damage
Example
The hurricane had disastrous effects on the city.
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.
C2 noun /ˌdiːlɛkˈteɪʃən/

delectation

Meaning
great pleasure or delight
Example
She read the story aloud for the delectation of her friends.
B1 noun /dɒt/

dot

Meaning
a small round mark or spot
Example
She drew a red dot on the paper.
A2 noun /dɪˈzæs.tər/

Disaster

Meaning
a sudden event causing great damage or loss of life; a complete failure
Example
The earthquake was a natural disaster that affected thousands of families.
C1 noun ˈdɪk.ʃən

diction

Meaning
The style of pronunciation and word choice in speaking or writing.
Example
A strong diction enhances communication skills.
C1 verb /diːˈfjuːz/

defuse

Meaning
To make a situation less dangerous, tense, or explosive; to remove a fuse from a bomb.
Example
The negotiator helped defuse the tense situation.
B2 verb /dɪˈnaʊns/

denounce

Meaning
To publicly declare something to be wrong, evil, or condemn strongly.
Example
The leader denounced corruption in his speech.
C1 noun/verb /dɪsˈkwaɪət/

disquiet

Meaning
A feeling of worry or unease; to make someone feel anxious or uneasy.
Example
The strange silence filled the room with disquiet.
B2 verb, noun /dɑːrt/

dart

Meaning
to move suddenly and quickly; a small pointed missile thrown at a target
Example
The cat darted across the street to avoid the car.
B1 noun /dɪˈbeɪts/

debates

Meaning
Formal discussions where different viewpoints are presented and argued.
Example
Debates on governance lasted throughout the session.
C1 verb /dɪˈfrɔːd/

defraud

Meaning
to illegally take money or valuables from someone by deception
Example
The company was accused of trying to defraud investors.
B2 verb /dɪsˈkʌrɪdʒ/

discourage

Meaning
to make someone less confident or enthusiastic about doing something
Example
Failure should not discourage you from trying again.
B2 noun /ˈdʌklɪŋ/

duckling

Meaning
a young duck
Example
The mother duck led her ducklings to the pond.
C1 adjective /ˌdɪfəˈrɛnʃəl/

differential

Meaning
Relating to or showing a difference; involving a distinction.
Example
There is a differential treatment between the two groups.