delude
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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 noun /dɪˈfaɪəns/

defiance

Meaning
Open resistance or bold disobedience.
Example
The protest was an act of defiance against injustice.
C1 noun/verb /dɛnt/

dent

Meaning
a small hollow mark on the surface of something; to make a small hollow mark
Example
The accident left a dent in the car door.
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 dɪˌlɪb.əˈreɪ.ʃən

deliberation

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

decimate

Meaning
To destroy or kill a large proportion of something.
Example
The wildfire decimated the forest.
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 /ˌdɛrɪˈveɪʃən/

derivation

Meaning
The origin or development of something from a source.
Example
The derivation of the word comes from Latin.
C1 noun /ˌdɛtəˈneɪʃən/

detonation

Meaning
The act of exploding or causing something to explode.
Example
The sudden detonation shook the entire building.
C1 verb /dɪˈsɛnt/

dissent

Meaning
To hold or express opinions that are different from those officially accepted.
Example
Several members dissented from the majority decision.
C1 noun /ˈded.lɑk/

Dead-lock

Meaning
a situation in which no progress is possible; complete standstill
Example
The negotiations reached a deadlock when neither side would compromise.
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.
C1 noun/adjective /dɪˈtɜː.rənt/

deterrent

Meaning
A thing that discourages or is intended to discourage someone from doing something.
Example
A strict law serves as a deterrent to crime.
C1 noun /dɪˈfɪʃ.ən.si/

Deficiency

Meaning
a lack or shortage of something; inadequacy or insufficiency
Example
The doctor diagnosed a vitamin D deficiency in the patient's blood test.
C1 noun /dɪˈmiːnər/

demeanour

Meaning
a person's outward behavior or appearance
Example
Her calm demeanour impressed everyone during the meeting.
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 verb /dɪˈplɔːr/

deplore

Meaning
to feel or express strong disapproval of something; to regret deeply
Example
Many people deplore the violence shown on television.
C1 verb /dɪsˈhɑːrtn/

dishearten

Meaning
to cause someone to lose determination or confidence; to discourage
Example
The constant rejection letters began to dishearten the young writer.
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.
C1 verb /dɪsˈɡrʌntl/

disgruntle

Meaning
to make someone dissatisfied or discontented
Example
The unfair treatment disgruntled the workers.
C1 noun/verb /ˈdiːkɔɪ/

decoy

Meaning
something or someone used to lure or mislead
Example
The hunters used a wooden duck as a decoy.
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.
C1 adjective /dɪˈsɜːrnɪŋ/

discerning

Meaning
having good judgment or insight; able to distinguish well
Example
He is a discerning reader who notices subtle details.
C1 verb /dɪˈspɜːrs/

disperse

Meaning
To scatter or spread widely in different directions.
Example
The police used tear gas to disperse the crowd.
C1 noun dɪˈdʒɛnəˌreɪtɪv dɪˈzizɪz

degenerative diseases

Meaning
Medical conditions that involve the deterioration or progressive decline of tissues, organs, or functions
Example
Degenerative diseases are common in an aging population.
C1 adjective /dɪˈvaʊt/

devout

Meaning
Deeply religious or sincere.
Example
He is a devout believer who prays every day.
C1 adjective /dɪˈraɪsɪv/

derisive

Meaning
Expressing contempt or ridicule.
Example
She gave a derisive laugh at his attempt to sing.
C1 noun /ˈdaʊn.pɔːr/

Downpour

Meaning
a heavy fall of rain; a sudden heavy rainfall
Example
The sudden downpour caught everyone off guard and soaked the outdoor event.
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 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 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 /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 verb /ˈdɛprɪˌkeɪt/

deprecate

Meaning
to express disapproval of something
Example
The teacher deprecated the use of slang in academic essays.
C1 verb /daɪˈvʌldʒ/

divulge

Meaning
to make known something private, secret, or previously unknown
Example
She refused to divulge the source of her information.
C1 adjective /dɪˈvɔɪd/

devoid

Meaning
Completely lacking or without something.
Example
His speech was devoid of any real emotion.
C1 verb /deɪz/

daze

Meaning
to stun or confuse someone temporarily with a shock or surprise
Example
The bright lights dazed the runners as they entered the stadium.
C1 adjective /dɪsˈhɑːrtənd/

Disheartened

Meaning
discouraged; feeling dejected; losing hope or confidence
Example
She felt disheartened after failing the exam twice.
C1 verb /dɪsˈtrʌst/

distrust

Meaning
to have no confidence or trust in someone or something
Example
Many people distrust politicians.
C1 adjective /ˈdɪs.ə.plɪ.ner.i/

Disciplinary

Meaning
relating to discipline; intended to correct behavior
Example
The company took disciplinary action against the employee.
C1 noun /dɪˈfɔː.mə.ti/

Deformity

Meaning
a distorted or unnatural shape or form; physical malformation
Example
The accident caused a permanent deformity in his left hand.
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.
C1 noun /ˌdiː.kɒmpəˈzɪʃən/

decomposition

Meaning
the process of decaying or breaking down into simpler parts
Example
The decomposition of leaves enriches the soil.
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 /draɪ fɪʃ/

Dry fish

Meaning
fish that has been preserved by drying in the sun or by other dehydration methods
Example
Dry fish is a popular preserved food in many coastal regions.
C1 verb /ˌdɪskənˈsɜːrt/

disconcert

Meaning
To unsettle, confuse, or disturb the composure of someone.
Example
The sudden change of plans disconcerted the team.
C1 noun dɪˈpliː.ʃən

depletion

Meaning
The gradual reduction or exhaustion of a resource or substance.
Example
Overuse of groundwater leads to depletion of water resources.
C1 adjective /dɪˈspɪrɪtɪd/

dispirited

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

defunct

Meaning
No longer existing, operating, or functioning.
Example
The company became defunct after the financial 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 /dɪˈbeɪs/

debase

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

disband

Meaning
to break up and stop functioning as a group or organization
Example
The club decided to disband after twenty years of activity.
C1 adjective /dɪˈsɪd.ju.əs/

deciduous

Meaning
Referring to trees that shed their leaves seasonally, typically in autumn.
Example
Oak and maple trees are deciduous, shedding leaves in autumn.
C1 verb /dɪˈfaɪl/

defile

Meaning
to pollute, corrupt, or make dirty
Example
The river was defiled by industrial waste.
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 ˌdɛɡrəˈdeɪʃən

degradation

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

demote

Meaning
to reduce to a lower rank or position
Example
The manager decided to demote the employee for poor performance.
C1 adjective /dɪsˈrɛpjətəbl̩/

disreputable

Meaning
having a bad reputation; not considered respectable or trustworthy
Example
The journalist avoided staying in the disreputable part of town.
C1 adjective /dɪˈspɒndənt/

despondent

Meaning
feeling or showing deep hopelessness or discouragement
Example
She felt despondent after losing her job.
C1 verb /daɪˈɡrɛs/

digress

Meaning
To leave the main subject temporarily in speech or writing.
Example
The professor began to digress from the main topic of the lecture.
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 /ˈdeɪˌbreɪk/

daybreak

Meaning
The time in the morning when daylight first appears; dawn.
Example
They set out on their journey at daybreak.
C1 noun ˈdɛf.ər.əns

deference

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

dossier

Meaning
A collection of documents about a particular person, event, or subject.
Example
The lawyer presented a dossier of evidence to the court.
C1 noun /ˌdaɪəˈrɑːmə/

diorama

Meaning
a three-dimensional model representing a scene, often with miniature figures
Example
The museum displayed a diorama of an ancient village.
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.
C1 noun /dɜːrθ/

dearth

Meaning
A scarcity or lack of something.
Example
There was a dearth of food during the famine.
C1 noun /ˈdrɛsˌmeɪkər/

dressmaker

Meaning
A person who makes or alters women's clothing professionally.
Example
The dressmaker crafted a beautiful gown for the bride.
C1 noun /dɪˈvɪnɪti/

divinity

Meaning
The quality or state of being divine; a deity.
Example
The priest spoke about the divinity of the soul.
C1 adjective /ˈdɒdʒi/

Dodgy

Meaning
suspicious; questionable; unreliable; risky or dangerous
Example
That deal sounds dodgy to me.
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 verb /dɪˈfeɪs/

deface

Meaning
to spoil the surface or appearance of something, especially by writing or drawing on it
Example
The vandals defaced the wall with graffiti.
C1 adjective /ˌdaɪəˈbɒlɪkəl/

diabolical

Meaning
Wicked, cruel, or outrageously bad; resembling the devil.
Example
The dictator’s diabolical rule brought misery to the nation.
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 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 verb, noun /ˌdɪsɪˈluːʒən/

disillusion

Meaning
to cause someone to realize that something is not as good as they believed
Example
The scandal disillusioned many voters.
C1 noun /ˈderˌdevəl/

daredevil

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

diminutive

Meaning
extremely or unusually small
Example
Despite his diminutive size, he was a powerful leader.
C1 noun /ˈdeɪ.li.ə/

Dahlia

Meaning
a garden plant with brightly colored flowers that bloom in summer and autumn
Example
She planted colorful dahlias in her garden last summer.
C1 noun /ˌdɪs.əˈreɪ/

disarray

Meaning
A state of disorganization or untidiness; confusion or disorder.
Example
His desk was in complete disarray.
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 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.
C1 verb /dɪsˈpærɪdʒ/

disparage

Meaning
to criticize someone or something in a way that shows a lack of respect
Example
It is unfair to disparage people for their opinions.
C1 verb /dɪsˈmæntəl/

dismantle

Meaning
to take apart; to remove or destroy the parts of
Example
Workers will dismantle the old bridge next month.
C1 noun /ˈdɛspɒt/

despot

Meaning
a ruler with absolute power, often ruling in a cruel or oppressive way
Example
The despot ruled the nation with fear and violence.
C1 adjective /ˌdɪfəˈrɛnʃəl/

differential

Meaning
Relating to or showing a difference; involving a distinction.
Example
There is a differential treatment between the two groups.
C1 verb /dɪˈkraɪ/

decry

Meaning
to publicly criticize or express strong disapproval of something
Example
Many activists decry the destruction of the rainforest.
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 /dɪˌlɪb.əˈreɪ.ʃənz/

deliberations

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

decelerate

Meaning
to reduce speed; to slow down
Example
The car began to decelerate as it approached the traffic light.
C1 noun /ˈdel.ɪ.kə.si/

Delicacy

Meaning
fineness of texture or structure; a choice or expensive food; sensitivity in handling
Example
The chef prepared a local delicacy that was famous throughout the region.
C1 noun /ˈdeɪ.ə.ti/

deity

Meaning
a god or goddess
Example
The temple is dedicated to a Hindu deity.
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 verb /dɪsˈkleɪm/

disclaim

Meaning
to deny responsibility or connection with something
Example
The company disclaimed responsibility for the accident.
C1 noun /ˌdɒmɪˈneɪʃən/

domination

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

demonstrator

Meaning
a person who shows how something works or takes part in a public protest
Example
The demonstrators marched peacefully through the city streets.
C1 noun /doʊ/

doe

Meaning
a female deer, especially an adult one
Example
The doe and her fawn were grazing in the meadow.
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 ˈdɪl.ɪ.dʒəns

diligence

Meaning
Careful and persistent work or effort.
Example
Success requires patience and diligence.
C1 adjective ˈdɔːn.tɪŋ

daunting

Meaning
Something that seems intimidating or challenging.
Example
The task seemed daunting, but she completed it successfully.
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 adjective, noun /ˈdɛrəlɪkt/

derelict

Meaning
in poor condition due to neglect or disuse; a homeless or neglected person
Example
The old factory stood derelict for decades.
C1 adverb /ˈduːli/

Duly

Meaning
in accordance with what is required or appropriate; at the proper time
Example
The documents were duly signed and submitted.
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 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.
C1 noun /dɪˈluːʒən/

delusion

Meaning
A false belief or impression maintained despite being contradicted by reality.
Example
He lived under the delusion that he was invincible.
C1 adjective dɒɡˈmæt.ɪk

dogmatic

Meaning
Being inclined to lay down principles as incontrovertibly true; characterized by arrogant assertion of unproven principles.
Example
His dogmatic approach to politics made discussions difficult.
C1 noun /ˈdɛljuːdʒ/

deluge

Meaning
A severe flood; an overwhelming quantity of something.
Example
The town was hit by a deluge of rain in just a few hours.
C1 adjective /dɪˈmɒnstrətɪv/

demonstrative

Meaning
openly showing feelings, especially affection or emotion
Example
She was very demonstrative with her affection towards her friends.
C1 noun ˌdiːˌrɛɡ.jʊˈleɪ.ʃən

deregulation

Meaning
The removal or reduction of government regulations in an economic sector.
Example
Deregulation has increased competition in the telecommunications sector.
C1 verb /daʊs/

douse

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

disobedience

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

dislocate

Meaning
To disturb the normal position of something, especially a joint in the body.
Example
He dislocated his shoulder while playing football.
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 verb /diːˈkoʊd/

decode

Meaning
to convert a coded message into a readable form; to interpret meaning
Example
The software can decode the hidden message within seconds.
C1 adjective /ˈdɛkədənt/

decadent

Meaning
Characterized by or reflecting a state of moral or cultural decline; excessively self-indulgent.
Example
The party was filled with decadent luxury and excess.
C1 verb /dɪˈpoʊz/

depose

Meaning
to remove someone from office or power, especially suddenly and forcefully
Example
The rebels managed to depose the dictator after years of unrest.
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 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.