divisor
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C1 noun /dɪˈvaɪzər/

divisor

Meaning
A number by which another number is divided.
Example
In the equation 12 ÷ 3, the number 3 is the divisor.
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 /ˈdiːviəns/

deviance

Meaning
Behavior that differs from accepted social or moral standards.
Example
The book studies deviance in urban youth culture.
C1 adjective daɪˈvɜː.dʒənt

divergent

Meaning
Tending to be different or develop in different directions
Example
Divergent policies create challenges in collaboration.
C1 noun dɪˌzɝː.t̬ə.fɪˈkeɪ.ʃən

desertification

Meaning
The process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture.
Example
Deforestation accelerates desertification.
C1 verb /dɪˈsɛləˌreɪt/

decelerate

Meaning
to reduce speed; to slow down
Example
The car began to decelerate as it approached the traffic light.
C1 verb diːˈsɛn.sɪ.taɪz

desensitize

Meaning
To make someone less sensitive or reactive to something through repeated exposure.
Example
Constant exposure to violence can desensitize people.
C1 noun /ˌdez.ɪɡˈneɪ.ʃən/

Designation

Meaning
the action of choosing someone for a position; a name, title, or official status
Example
His designation as team leader came with additional responsibilities and authority.
C1 noun /ˌdɪfəˈrɛnʃɪˈeɪʃən/

differentiation

Meaning
The action or process of differentiating or distinguishing between things.
Example
Differentiation from competitors can create a unique market position.
C1 noun dɪˌlɪb.əˈreɪ.ʃən

deliberation

Meaning
Long and careful consideration or discussion.
Example
The agreement was finalized after much deliberation.
C1 noun /dɪˈspɜːrʒən/

dispersion

Meaning
The action or process of distributing things or people over a wide area.
Example
The dispersion of seeds by the wind helps plants reproduce.
C1 adjective /dɪˈklærətɪv/

declarative

Meaning
relating to a statement that declares something; in grammar, a sentence that makes a statement
Example
A declarative sentence simply states a fact or opinion.
C1 verb /dɪˈflɛkt/

deflect

Meaning
to cause something to change direction; to avoid answering directly
Example
The shield deflected the incoming arrow.
C1 adjective /dɪˈbɪl.ɪ.teɪ.tɪŋ/

debilitating

Meaning
Making someone or something weak and infirm.
Example
The disease had a debilitating effect on his health.
C1 verb /dɪˈzɪst/

desist

Meaning
to stop doing something, especially an action considered wrong or undesirable
Example
The judge ordered the company to desist from unfair practices.
C1 verb /daɪˈluːt/

dilute

Meaning
To make a liquid thinner or weaker by adding water or another solvent.
Example
You should dilute the juice with water before serving it to children.
C1 verb /dɪˈdjuːs/

deduce

Meaning
to reach a conclusion by reasoning or inference
Example
From the evidence, the detective deduced that the suspect was lying.
C1 adjective /dɪˈvɪzəbl/

divisible

Meaning
Capable of being divided by another number without leaving a remainder.
Example
Twelve is divisible by three and four.
C1 noun /ˌdiːˈmer.ɪt/

Demerit

Meaning
a fault or disadvantage; a mark given for a fault or offense
Example
The student received a demerit for arriving late to class repeatedly.
C1 adjective /dæft/

daft

Meaning
Silly or foolish.
Example
It was a daft idea to go hiking without water.
C1 verb /doʊt/

dote

Meaning
to show excessive love or fondness for someone or something
Example
She tends to dote on her grandchildren.
C1 noun dɪˈskrep.ən.siz

discrepancies

Meaning
Differences between things that should be the same
Example
Discrepancies in regulations delay progress.
C1 noun /dɪˈkɔː.rəm/

Decorum

Meaning
behavior in keeping with good taste and propriety; dignified and appropriate conduct
Example
The diplomat maintained perfect decorum throughout the heated negotiations.
C1 adjective /ˈdiːviəs/

devious

Meaning
Skillful at using underhanded tactics to achieve goals; not straightforward.
Example
He used a devious plan to gain control of the company.
C1 adjective /dɪˈskrɪmɪˌneɪtɪŋ/

discriminating

Meaning
Having refined taste or good judgment; able to recognize subtle differences.
Example
She is known for her discriminating taste in art.
C1 noun /dɪˈfɛkʃən/

defection

Meaning
The act of abandoning one’s country, cause, or group in favor of another.
Example
The politician’s defection shocked his supporters.
C1 noun /dɪˈprɛsənt/

depressant

Meaning
A drug that reduces functional or nervous activity in the body.
Example
Alcohol acts as a depressant on the central nervous system.
C1 noun /ˈdaɪhɑːrd/

diehard

Meaning
A person who strongly resists change and remains loyal to a belief or cause.
Example
He is a diehard fan of classic rock music.
C1 adjective /dɪˈspɜːrst/

dispersed

Meaning
Scattered or spread across a wide area.
Example
The dispersed population made it difficult to provide public services.
C1 noun /djʊˈrɛs/

duress

Meaning
threats, violence, or pressure used to force someone to do something
Example
She signed the contract under duress.
C1 adjective /dɪˈspɒndənt/

despondent

Meaning
feeling or showing deep hopelessness or discouragement
Example
She felt despondent after losing her job.
C1 noun /deɪˈbɑː.kəl/

debacle

Meaning
A sudden and ignominious failure; a fiasco.
Example
The company's poor management led to a financial debacle.
C1 adjective /dɪˈɡreɪdɪd/

degraded

Meaning
Reduced in quality, dignity, or condition.
Example
The villagers were forced to live in degraded conditions.
C1 verb /dɪˈpliːt/

deplete

Meaning
to reduce the quantity or supply of something
Example
The long war has depleted the country's resources.
C1 noun /ˌdɪsbɪˈliːvər/

disbeliever

Meaning
a person who does not believe in something, especially a religion or idea
Example
He was called a disbeliever for rejecting the traditional faith.
C1 verb /dɪsˈkwɑːlɪfaɪ/

disqualify

Meaning
to officially prevent someone from participating or being eligible
Example
The referee decided to disqualify the player for cheating.
C1 noun /dɪˈsɜːn.mənt/

discernment

Meaning
The ability to judge well or understand something correctly; keen insight.
Example
His discernment in business decisions made him successful.
C1 verb /dɪsˈsætɪsfaɪ/

dissatisfy

Meaning
to fail to please or meet expectations; to make someone unhappy
Example
The poor service dissatisfies many customers.
C1 verb /dɪˈbɑːr/

debar

Meaning
To officially prevent someone from doing something.
Example
He was debarred from entering the competition due to cheating.
C1 verb /ˈduːdəl/

doodle

Meaning
To draw or scribble absentmindedly, often while thinking about something else.
Example
She doodled flowers in the corner of her notebook during class.
C1 verb /dʌb/

dub

Meaning
to give a name or label to something; to add a soundtrack to a film or recording
Example
The movie was dubbed into several languages for international release.
C1 noun /dɜːrθ/

dearth

Meaning
A scarcity or lack of something.
Example
There was a dearth of food during the famine.
C1 noun dɪˌtɪə.ri.əˈreɪ.ʃən

deterioration

Meaning
The process of becoming progressively worse; decline in quality, condition, or strength.
Example
Poor maintenance leads to material deterioration.
C1 verb /dɪˈɡreɪd/

degrade

Meaning
To lower in dignity, quality, or value; to treat with disrespect or to deteriorate.
Example
Harsh words can degrade a person's confidence.
C1 verb /diːˈhaɪdreɪt/

dehydrate

Meaning
to remove water from something; to lose water or body fluids
Example
Running in the heat can quickly dehydrate you.
C1 verb /dɪˈstɪl/

distill

Meaning
To purify a liquid by heating and cooling; to extract the essential meaning or most important aspects.
Example
The factory distills water to make it safe for drinking.
C1 adjective /dɪˈfaɪənt/

Defiant

Meaning
boldly resistant or challenging; disobedient
Example
The defiant student refused to follow the rules.
C1 noun /dɪˈlɪriəm/

delirium

Meaning
An acutely disturbed state of mind characterized by restlessness, illusions, and incoherence.
Example
The patient experienced delirium after the surgery due to the strong medication.
C1 noun /ˌdɒmɪˈneɪʃən/

domination

Meaning
the exercise of control or influence over someone or something
Example
The empire sought domination over its neighbors.
C1 adjective /dɪˈstrɔːt/

distraught

Meaning
extremely upset and anxious, often to the point of being unable to think clearly
Example
She was distraught after losing her pet.
C1 noun delˈteɪɪk ˈlændskeɪp

deltaic landscape

Meaning
A geographical area formed by sediment deposits at the mouth of a river, creating a triangular land formation.
Example
Bangladesh has a unique deltaic landscape.
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.
C1 noun /ˈdaɪnəˌmoʊ/

dynamo

Meaning
A machine that generates electricity; a person with great energy and enthusiasm.
Example
She is the real dynamo behind the success of the company.
C1 noun /ˈdrʌdʒəri/

drudgery

Meaning
Hard, menial, or dull work.
Example
She wanted to escape the drudgery of her daily routine.
C1 adjective /dɪˈfɪʃənt/

Deficient

Meaning
not having enough of a specified quality or ingredient; lacking or inadequate
Example
His diet was deficient in essential vitamins.
C1 noun ˈdɪskɔrd

discord

Meaning
Disagreement or conflict between people or ideas.
Example
Discord among people disrupts societal stability.
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.
C1 verb /ˌdiː.kəmˈprɛs/

decompress

Meaning
To relax and recover from stress or pressure.
Example
Taking deep breaths helps to decompress after a stressful day.
C1 adjective /ˈdaɪ.si/

dicey

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

Desolate

Meaning
deserted; lonely; barren
Example
The abandoned village looked desolate and empty.
C1 noun /ˈdɑː.mə.saɪl/

domicile

Meaning
A person's legal residence or permanent home.
Example
He declared Canada as his legal domicile.
C1 noun /ˈdɪsɪdənt/

dissident

Meaning
A person who opposes official policy, especially that of an authoritarian state.
Example
The dissident was arrested for speaking against the government.
C1 adjective /dɪˈraɪsɪv/

derisive

Meaning
Expressing contempt or ridicule.
Example
She gave a derisive laugh at his attempt to sing.
C1 verb /dɪˈpɔːrt/

deport

Meaning
To expel a foreigner from a country, usually for legal or political reasons.
Example
The government decided to deport the illegal immigrants.
C1 noun ˌdjʊə.rəˈbɪl.ə.ti

durability

Meaning
The ability to withstand wear, pressure, or damage; hard-wearing.
Example
The durability of materials affects performance.
C1 noun /ˈdeɪtəm/ or /ˈdætəm/

datum

Meaning
a single piece of information; a fact used as a basis for reasoning or calculation
Example
Each datum in the survey was carefully analyzed.
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.
C1 adjective ˌdet.rɪˈmen.təl

detrimental

Meaning
Tending to cause harm; damaging or harmful.
Example
Pollution has detrimental effects on fertility.
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.
C1 adjective /ˈdeɪnti/

dainty

Meaning
Delicately small, pretty, and often considered elegant.
Example
She wore a dainty necklace made of pearls.
C1 verb /dɪˈsweɪd/

dissuade

Meaning
To persuade someone not to do something.
Example
She tried to dissuade him from quitting his job.
C1 noun /draɪ ˈtʃɪl.i/

Dry Chilli

Meaning
dried chili peppers used as spice for adding heat to food
Example
The recipe calls for two dry chillies to make it spicy.
C1 verb /dɪsˈpruːv/

disprove

Meaning
to show that something is false or wrong
Example
The scientist worked hard to disprove the old theory.
C1 verb /dɪˈfaɪl/

defile

Meaning
to pollute, corrupt, or make dirty
Example
The river was defiled by industrial waste.
C1 verb /ˌdɪsɪnˈɡeɪdʒ/

disengage

Meaning
To release or detach oneself from something; to withdraw.
Example
He tried to disengage from the heated argument.
C1 adjective /dɪˈskriːt/

discrete

Meaning
individually separate and distinct
Example
The course is divided into three discrete modules.
C1 noun dɪˈspær.ə.ti

disparity

Meaning
A great difference or inequality.
Example
Disparity between countries must be reduced.
C1 noun /diːˌtɒksɪfɪˈkeɪʃən/

detoxification

Meaning
The process of removing toxic substances from a living organism.
Example
Detoxification helps to cleanse the body of harmful substances.
C1 verb /ˈdrɪbəl/

dribble

Meaning
to let liquid flow slowly in drops or to move a ball skillfully with repeated small kicks or bounces
Example
The baby dribbled milk on his shirt.
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 verb /ˈdɛprɪˌkeɪt/

deprecate

Meaning
to express disapproval of something
Example
The teacher deprecated the use of slang in academic essays.
C1 noun ˈdɛf.ər.əns

deference

Meaning
Humble submission and respect.
Example
He showed deference to his elderly mentor.
C1 verb, noun /dɪsˈkrɛdɪt/

discredit

Meaning
To harm the reputation of someone or something; loss of respect or credibility.
Example
The scandal discredited the politician in the eyes of the public.
C1 noun /dʌsk/

Dusk

Meaning
the period of the day when daylight is fading; twilight
Example
They walked along the beach during dusk, watching the sunset.
C1 verb ˈdwɪn.dl

dwindle

Meaning
To diminish gradually in size, amount, or strength; to become progressively smaller.
Example
His savings dwindled due to unexpected expenses.
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.
C1 noun dəˌmɛstɪˈkeɪʃən

domestication

Meaning
The process of taming an animal and keeping it as a pet or for farm produce.
Example
Domestication of animals has been crucial for human survival.
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.
C1 noun daɪˈkɒtəmi

dichotomy

Meaning
A division or contrast between two things that are or are represented as being opposed or entirely different.
Example
The dichotomy between tradition and modernity is often debated.
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 /ˈdɛnɪˌɡreɪt/

denigrate

Meaning
to criticize unfairly; to belittle or disparage someone or something
Example
He was quick to denigrate the achievements of his colleagues.
C1 adjective /daɪər/

Dire

Meaning
extremely serious; urgent; terrible
Example
The country is facing a dire economic crisis.
C1 noun /ˌdɪsərˈteɪʃən/

dissertation

Meaning
A long piece of writing on a particular subject, usually written for a university degree.
Example
She spent two years writing her doctoral dissertation.
C1 verb /dɪˈluːd/

delude

Meaning
To mislead someone into believing something that is not true.
Example
He deluded himself into thinking he could win the race without training.
C1 verb /dɪˈbeɪs/

debase

Meaning
to reduce the quality, value, or dignity of something
Example
Corruption can debase the values of a society.
C1 adjective /dɪsˈkwaɪətɪŋ/

disquieting

Meaning
Causing worry, unease, or anxiety.
Example
The news report was deeply disquieting to the public.
C1 noun /ˈdeɪ.ə.ti/

deity

Meaning
a god or goddess
Example
The temple is dedicated to a Hindu deity.
C1 noun /djuːˈɛt/

duet

Meaning
a musical performance by two singers or instrumentalists
Example
They sang a beautiful duet together on stage.
C1 noun ˌdɛməˈɡræfɪk trænˈzɪʃən

demographic transition

Meaning
A shift in population patterns from high birth and death rates to low birth and death rates as a country develops economically
Example
The demographic transition indicates a shift towards an aging society.
C1 noun /ˌdɪspəˈzɪʃən/

disposition

Meaning
A person's usual attitude or temperament; arrangement or tendency.
Example
She has a cheerful disposition despite the difficulties.
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.
C1 verb /daʊs/

douse

Meaning
to pour liquid over; to extinguish a fire or light
Example
Firefighters doused the flames with water.
C1 noun /ˈdɛməɡɒɡ/

demagogue

Meaning
A political leader who seeks support by appealing to popular desires and prejudices rather than by using rational argument.
Example
The crowd was swayed by the fiery speeches of the demagogue.
C1 noun /dɪˌlɪb.əˈreɪ.ʃənz/

deliberations

Meaning
Careful consideration and discussion before making decisions.
Example
Deliberations on sustainability continued for hours.
C1 noun /dɪˈmaɪz/

demise

Meaning
Death or end of something, especially the end of an institution or system.
Example
The sudden demise of the company shocked investors.
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 verb /ˌdiːˈbʌŋk/

debunk

Meaning
Expose the falseness or hollowness of (a myth, idea, or belief).
Example
Scientists debunked the myth that vaccines cause autism.
C1 noun /ˈdiːvə/

diva

Meaning
a famous female singer; a woman who is admired or behaves like a star
Example
The pop diva performed her latest hit to a cheering crowd.
C1 adjective /ˈdɒɡɪd/

dogged

Meaning
showing stubborn determination and persistence
Example
She succeeded through dogged determination.
C1 verb /dɪˈsɛm.ɪ.neɪt/

disseminate

Meaning
To spread or give out something, especially news, information, ideas, etc., to a lot of people.
Example
Social media helps to disseminate information quickly.
C1 noun ˌdaɪvɜːsɪfɪˈkeɪʃən

diversification

Meaning
The practice of spreading investments across various assets or sectors to reduce risk.
Example
Diversification helps to reduce investment risk.
C1 noun, verb /dɪsˈɑːnər/

dishonor

Meaning
a state of shame or loss of respect; to bring shame upon someone or something
Example
The soldier felt he had brought dishonor to his family.
C1 verb /dɪˈteɪn/

detain

Meaning
to keep someone from proceeding; to hold back, especially by official authority
Example
The police detained the suspect for questioning.
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.
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 /ˌdɪspɛnˈseɪʃən/

dispensation

Meaning
An exemption from a rule or usual requirement; a system of order, government, or control.
Example
The school granted him a special dispensation to skip the exam due to illness.
C1 adjective /dɪsˈkɔːrdənt/

discordant

Meaning
disagreeing or clashing; harsh and jarring in sound
Example
The discordant notes of the band hurt our ears.
C1 adjective /dɪˈmɛntɪd/

demented

Meaning
behaving irrationally due to mental illness or extreme excitement
Example
He looked demented after hearing the shocking news.
C1 noun /ˈdæmpər/

damper

Meaning
something that reduces or lessens the force, effect, or excitement
Example
The cancellation of the trip put a damper on their enthusiasm.
C1 verb /dɪsˈmæntəl/

dismantle

Meaning
to take apart; to remove or destroy the parts of
Example
Workers will dismantle the old bridge next month.