hydrogen-powered buses
All a b c d e f g h i j k l m n o p q r s t u v w x y z
All CEFR A1 A2 B1 B2 C1 C2
Content locale
EN English BN Bengali HI Hindi ES Spanish FR French DE German RU Russian ZH Chinese JA Japanese
All Vocabulary Cards All Vocabularies
C1 noun ˈhaɪ.drə.dʒən ˈpaʊ.əd bʌsɪz

hydrogen-powered buses

Meaning
Buses powered by hydrogen fuel cells that produce only water vapor as emission.
Example
Hydrogen-powered buses reduce air pollution.
C1 noun /ˈhaɪ.drəʊˌpaʊər ˌdʒen.əˈreɪ.ʃən/

hydropower generation

Meaning
The production of electrical power through the use of the gravitational force of falling or flowing water.
Example
Hydropower generation promotes green energy.
C1 noun /ˈhiːdəˌnɪzəm/

hedonism

Meaning
The pursuit of pleasure and self-indulgence as the highest goal.
Example
The lifestyle of the rich is often criticized as pure hedonism.
C1 noun /ˈhɒl.ə.kɔːst/

holocaust

Meaning
A large-scale destruction, especially by fire; historically, the genocide of Jews during World War II.
Example
Millions of people perished during the Holocaust.
C1 noun /hjuːˈmɪl.ɪ.ti/

humility

Meaning
The quality of having a modest or low view of one's importance.
Example
She accepted the award with grace and humility.
C1 noun /ˈhɪpnətɪzəm/

hypnotism

Meaning
The practice or act of inducing hypnosis.
Example
He studied hypnotism as part of his psychology degree.
C1 noun (plural) /ˈhɪntərlændz/

hinterlands

Meaning
Plural of hinterland; remote or less developed regions.
Example
Explorers traveled deep into the hinterlands of the country.
C1 verb /hoʊn/

hone

Meaning
To sharpen a blade or to improve a skill through practice.
Example
She honed her presentation skills before the big meeting.
C1 noun /ˈherən/

Heron

Meaning
large wading bird with long legs and neck that feeds on fish
Example
The heron stood motionless by the water's edge, waiting for fish.
C1 adjective /ˈhɪd.i.əs/

Hideous

Meaning
extremely ugly or unpleasant; causing shock or disgust
Example
The monster in the movie had a hideous appearance.
C1 adjective /ˌhɛtərəˈʤiːniəs/

heterogeneous

Meaning
consisting of different kinds or diverse elements
Example
The classroom was filled with a heterogeneous group of students.
C1 verb /ˈhaɪdʒæk/

hijack

Meaning
to take control of a vehicle or situation illegally or by force
Example
The criminals attempted to hijack the airplane.
C1 noun /hjuː/

hue

Meaning
A color or shade.
Example
The artist chose a soft blue hue for the background.
C1 adjective /hɜːrˈbɪv.ər.əs/

Herbivorous

Meaning
feeding on plants; plant-eating
Example
Cows are herbivorous animals that graze on grass.
C1 adjective /ˌhaɪdroʊɪˈlɛktrɪk/

hydroelectric

Meaning
Relating to or denoting the generation of electricity using flowing water.
Example
The country invested heavily in hydroelectric power plants.
C1 noun /helm/

Helm

Meaning
a tiller or wheel for steering a ship or boat; a position of leadership or control
Example
The experienced captain took the helm and expertly navigated the ship through the storm.
C1 noun /ˈhɛzɪtənsi/

hesitancy

Meaning
The tendency to pause or delay due to uncertainty or fear.
Example
His hesitancy in answering made everyone doubt his confidence.
C1 noun /ˈhaɪdəweɪ/

hideaway

Meaning
A place used as a retreat or a place to hide.
Example
The cabin in the woods was their secret hideaway.
C1 noun /ˌhoʊmiˈɑːpəθi/

homeopathy

Meaning
a system of alternative medicine based on treating diseases with highly diluted substances
Example
He believes in homeopathy for treating common colds.
C1 noun /ˈhæv.ək/

Havoc

Meaning
widespread destruction; great confusion or disorder; chaos
Example
The hurricane wreaked havoc on the coastal towns, destroying homes and businesses.
C1 noun /ˈhaɪ.nəs/

Highness

Meaning
a title given to a person of royal rank; the quality or state of being high or elevated
Example
Your Highness, the royal carriage is ready to take you to the state banquet this evening.
C1 adverb /ˈhɛdˌlɔŋ/

headlong

Meaning
With the head leading; in a rush or without thinking.
Example
She rushed headlong into the new project.
C1 noun /ˌhɑːmənaɪˈzeɪʃən/

harmonization

Meaning
The process of making things compatible or consistent with one another.
Example
The harmonization of different policies ensures consistent results.
C1 noun /ˈhɪr.seɪ/

Hearsay

Meaning
information received from other people that one cannot adequately substantiate; rumor
Example
The accusations were based on hearsay rather than concrete evidence or eyewitness testimony.
C1 noun /ˈhɒrəˌskoʊp/

horoscope

Meaning
A forecast of a person's future based on the positions of the stars and planets at their birth.
Example
She read her horoscope every morning to see what the stars predicted.
C1 adjective /ˈheɪt.fəl/

Hateful

Meaning
causing or deserving hatred; extremely unpleasant or offensive
Example
His hateful comments hurt everyone's feelings.
C1 noun /ˈheɪvən/

haven

Meaning
a safe place or shelter
Example
The library became a haven for students during exams.
C1 verb /hɜːrl/

hurl

Meaning
To throw something with great force.
Example
The boy hurled a stone into the river.
C1 noun /ˈhɑː.stɪdʒ/

Hostage

Meaning
a person seized or held as security for the fulfillment of a condition; captive
Example
The police negotiated carefully to secure the release of all hostages unharmed.
C1 adjective /həˈred.ɪ.ter.i/

Hereditary

Meaning
passed down through family genes; inherited from ancestors
Example
The hereditary disease was passed down through generations.
C1 adjective /ˈhɔː.ti/

Haughty

Meaning
arrogantly superior and disdainful; showing excessive pride
Example
She gave him a haughty look and walked away.
C1 noun /hɔːrd/

horde

Meaning
A large group or crowd, especially one that is disorderly or difficult to control.
Example
A horde of fans gathered outside the stadium.
C1 noun ˌhaɪ.droʊˈpɒn.ɪks

hydroponics

Meaning
Growing plants using nutrient-rich water instead of soil.
Example
Hydroponics allows crops to grow without soil.
C1 adjective /ˈhiːdləs/

heedless

Meaning
showing a reckless lack of care or attention
Example
He drove with heedless disregard for the rules.
C1 noun /haʊnd/

Hound

Meaning
a dog bred for hunting, typically having a keen sense of smell
Example
The bloodhound tracked the scent through the dense forest.
C1 verb /hiːd/

heed

Meaning
to pay attention to; to take notice of
Example
You should heed the teacher's advice.
C1 adjective /ˈheɪ.zi/

Hazy

Meaning
covered with haze; unclear or vague; lacking clarity
Example
The mountain tops were hazy in the morning mist.
C1 noun ˌhaɪ.drəˈlɒdʒ.ɪ.kəl ˈsaɪ.kəl

hydrological cycle

Meaning
The cycle of processes by which water circulates between the earth's oceans, atmosphere, and land.
Example
The hydrological cycle ensures continuous water movement in nature.
C1 noun ˈhʌz.bən.dri

husbandry

Meaning
The care, cultivation, and breeding of crops and animals; farming and agriculture.
Example
Proper husbandry techniques improve livestock health.
C1 noun /haɪˈpɜːrbəli/

hyperbole

Meaning
Exaggerated statements or claims not meant to be taken literally.
Example
Saying he could run a thousand miles in a day is pure hyperbole.
C1 adjective /ˌhæpi ɡoʊ ˈlʌki/

happy-go-lucky

Meaning
cheerfully unconcerned about the future; carefree
Example
She has a happy-go-lucky attitude and never worries about tomorrow.
C1 adverb /ˈhed ɑn/

Head-on

Meaning
directly facing; in direct confrontation or collision
Example
The two cars collided head-on at the intersection.
C1 adjective /ˌhɑːrdˈhɑːrtɪd/

hard-hearted

Meaning
showing no kindness or sympathy; cruel
Example
The landlord was hard-hearted and refused to help the poor family.
C1 noun /haɪˈeɪtəs/

hiatus

Meaning
A pause or break in continuity of a process or activity.
Example
The show returned after a long hiatus.
C1 adjective /ˈhɛlθfəl/

healthful

Meaning
Promoting good health; beneficial to health.
Example
A healthful diet includes fresh fruits and vegetables.
C1 noun /ˈheɪl.stɔːrm/

Hailstorm

Meaning
a violent storm with hail falling from the sky
Example
The hailstorm damaged many cars in the parking lot.
C1 noun /ˈhɔːl.mɑːrk/

hallmark

Meaning
a typical characteristic or feature of someone or something
Example
Honesty is the hallmark of a good leader.
C1 adjective /həˈmɑː.dʒə.nəs/

homogenous

Meaning
Similar or uniform in nature; often used interchangeably with 'homogeneous'.
Example
The class was made up of a homogenous group of students.
C1 noun /ˈhɑː.mə.nɪm/

homonym

Meaning
A word that is spelled and pronounced like another word but has a different meaning.
Example
The word 'bat' is a homonym because it can mean an animal or a sports tool.
C1 verb /ˈhaɪtən/

heighten

Meaning
to make or become greater in intensity or degree
Example
The announcement served to heighten the excitement in the room.
C1 verb /hɔːrd/

hoard

Meaning
to accumulate and hide away a large supply of something, often secretly
Example
During the crisis, many people began to hoard food and water.
C1 noun /ˈhɪp.ə.krɪt/

Hypocrite

Meaning
a person who acts in contradiction to their stated beliefs or feelings; a pretender
Example
Don't be a hypocrite by demanding honesty from others while lying yourself.
C1 noun /ˈhɜːrniə/

hernia

Meaning
A medical condition where an organ pushes through the muscle or tissue holding it in place.
Example
The doctor diagnosed him with an inguinal hernia.
C1 noun /ˈhɜː.mɪt/

Hermit

Meaning
a person living in solitude as a religious discipline; someone who withdraws from society
Example
The old hermit lived alone in a small cabin deep in the mountains, away from civilization.
C1 adjective /ˈhæɡ.ərd/

Haggard

Meaning
looking exhausted and unwell, especially from fatigue, worry, or suffering
Example
After working three nights without sleep, he looked haggard.
C1 noun /ˈɛər.luːm/

heirloom

Meaning
a valuable object that has belonged to a family for several generations
Example
The ring is a family heirloom passed down from her grandmother.
C1 adjective /hɔːrs/

Hoarse

Meaning
rough or harsh in sound; having a rough voice from shouting or illness
Example
His voice became hoarse after shouting at the concert.
C1 adjective /ˌhæpˈhæz.ɚd/

haphazard

Meaning
Lacking any obvious principle of organization; random.
Example
His haphazard approach led to project failure.
C1 adjective /ˈhæb.ɪ.tə.bəl/

Habitable

Meaning
suitable or good enough to live in
Example
The planet Mars may become habitable in the future.
C1 adjective /haɪˈdrɔːlɪk/

hydraulic

Meaning
operated by the pressure of liquid, especially water or oil
Example
The mechanic repaired the hydraulic system of the machine.
C1 adjective /hɪpˈnɒtɪk/

hypnotic

Meaning
Producing sleep or a trance-like state; mesmerizing.
Example
The music had a hypnotic effect on the audience.
C1 noun /ˈhæŋ.ər/

Hangar

Meaning
a large building with extensive floor area, typically for housing aircraft; an aircraft shelter
Example
The airplane was stored safely in the hangar during the severe thunderstorm.
C1 adjective /ˌhɒməˈdʒiːniəs/

homogeneous

Meaning
Of the same kind; alike.
Example
The team was not homogeneous in their skills.
C1 noun /ˈhæm.lət/

Hamlet

Meaning
a small rural settlement, smaller than a village; a small community
Example
The tiny hamlet nestled in the valley had only a dozen houses and one small church.
C1 adverb /ˈhɒtli/

hotly

Meaning
in an intense, angry, or passionate way
Example
She hotly denied the accusations.
C1 noun /hɪˈstɪəriə/

hysteria

Meaning
An uncontrollable outburst of emotion or fear, often characterized by irrational behavior.
Example
The crowd was in a state of hysteria during the concert.
C1 verb /hjuːˈmɪlieɪt/

humiliate

Meaning
to make someone feel ashamed or foolish by injuring their dignity
Example
He was humiliated by his public failure.
C1 noun/verb /hɛm/

hem

Meaning
the edge of a piece of cloth that is folded and sewn; to fold and sew the edge of cloth
Example
She hemmed the dress to make it shorter.
C1 noun /ˈhɛzɪtəns/

hesitance

Meaning
The quality or state of being reluctant or uncertain.
Example
Her hesitance to speak up delayed the decision.
C1 noun /ˈhɛrəsi/

heresy

Meaning
belief or opinion that goes against established religious doctrine or accepted beliefs.
Example
In medieval times, heresy was often punished severely.
C1 noun /hɪm/

hymn

Meaning
A religious song or poem of praise to God or a deity.
Example
The congregation sang a hymn during the morning service.
C1 adjective /ˈhɑːrtˌrɛndɪŋ/

heartrending

Meaning
Causing great sadness or distress; very moving emotionally.
Example
The documentary showed heartrending scenes of war victims.
C1 noun /huːf/

Hoof

Meaning
the hard part covering the foot of horses, cattle, sheep, and other animals
Example
The horse's hoof was injured after stepping on a sharp rock.
C1 adverb/noun /ˌhɪərˈæftər/

hereafter

Meaning
from now on; in the future; also refers to life after death.
Example
Hereafter, all reports must be submitted electronically.
C1 noun /ˈhjuːbrɪs/

hubris

Meaning
excessive pride or self-confidence
Example
His hubris led to his downfall.
C1 noun /ˈhɑː.mɪ.saɪd/

Homicide

Meaning
the deliberate and unlawful killing of one person by another; murder
Example
The detective was assigned to investigate the homicide that occurred downtown last night.
C1 adjective /həˈbɪtʃuəl/

habitual

Meaning
Done or doing constantly or as a habit; customary.
Example
He was a habitual latecomer to class.
C1 phrase ˌhjuː.məˈnɪt.ər.i.kəˈtæs.trə.fi

humanitarian catastrophe

Meaning
A widespread disaster affecting human life, health, and well-being on a large scale.
Example
The war created a humanitarian catastrophe.
C1 noun /ˈhɔːr.nət/

Hornet

Meaning
a large wasp that can sting and is often aggressive
Example
The hornet built its nest under the roof.
C1 verb /hɔːl/

haul

Meaning
to pull or drag something heavy with effort
Example
The workers hauled the boxes into the truck.
C1 adjective /ˌhɔːrtɪˈkʌltʃərəl/

horticultural

Meaning
Relating to the art or practice of garden cultivation and management.
Example
She studied horticultural science at the university.
C1 noun ˈhɪn.drəns

hindrance

Meaning
Something that creates difficulties or delays in progress.
Example
Lack of funds was a major hindrance to the project.
C1 adjective /hjuːˈmeɪn/

humane

Meaning
Showing compassion or benevolence.
Example
The doctor provided humane treatment to the injured animals.
C1 adverb /ˌhɛdˈfɜrst/

headfirst

Meaning
With the head leading; in a reckless or hasty manner.
Example
He dived headfirst into the pool.
C1 adjective /ˈhæk.nid/

hackneyed

Meaning
Used too often and therefore lacking originality or freshness.
Example
The speech was filled with hackneyed phrases that failed to inspire the audience.
C1 noun /ˈhɒməˌfoʊn/

homophone

Meaning
A word that is pronounced the same as another word but differs in meaning, and often spelling.
Example
The words 'pair' and 'pear' are homophones.
C1 adjective /ˈhɑːrdi/

hardy

Meaning
Strong, robust, and capable of enduring difficult conditions.
Example
Hardy plants can survive the harsh winter.
C1 noun /hɒˈstɪləti/

hostility

Meaning
hostile behavior; unfriendliness or opposition
Example
The negotiations ended in an atmosphere of hostility.
C1 noun ˈhɛroʊˌɪzəm

heroism

Meaning
Great bravery; the qualities or attributes of a hero.
Example
The heroism of freedom fighters inspires the nation.
C1 noun /hɪpˈnoʊsɪs/

hypnosis

Meaning
A trance-like state of consciousness usually induced by suggestion.
Example
She underwent hypnosis to overcome her fear of flying.
C1 noun /ˈhɑː.mɪdʒ/

Homage

Meaning
special honor or respect shown publicly; tribute paid to someone in recognition of their merit
Example
The memorial service was a touching homage to the brave soldiers who sacrificed their lives.
C1 noun /heɪz/

Haze

Meaning
a slight obscuration of the lower atmosphere, typically caused by fine suspended particles; confusion
Example
The morning haze lifted gradually as the sun rose higher in the sky.
C1 noun /ˈhiːdənɪst/

hedonist

Meaning
A person who believes that the pursuit of pleasure is the most important thing in life.
Example
She was called a hedonist because she always prioritized enjoyment over duty.
C1 adjective /ˈhæpləs/

hapless

Meaning
unfortunate, unlucky, deserving pity
Example
The hapless traveler lost his passport on the very first day.
C1 adjective /ˈhær.oʊ.ɪŋ/

harrowing

Meaning
extremely distressing or upsetting
Example
It was a harrowing experience to witness the accident.
C1 noun /ˈhæŋ.ər/

Hanger

Meaning
a shaped piece of wood, plastic, or metal with a hook at the top, used to hang up clothes
Example
She hung her dress on a wooden hanger to prevent it from getting wrinkled.
C1 verb /həˈluːsɪneɪt/

hallucinate

Meaning
to see, hear, or sense things that are not actually present, often due to illness or drugs
Example
After taking the medicine, he began to hallucinate strange shapes.
C1 verb /ˈhæmpər/

hamper

Meaning
to hinder or impede the movement or progress of
Example
The heavy rain hampered our travel plans.
C1 noun /haɪˈpɒtənjuːs/

hypotenuse

Meaning
the longest side of a right-angled triangle, opposite the right angle.
Example
In a right triangle, the hypotenuse is always longer than the other two sides.
C1 verb /ˈhʌsəl/

hustle

Meaning
to move quickly and energetically; to push or work hard to achieve something
Example
She had to hustle to finish the project on time.
C1 noun /ˈhɛrətɪk/

heretic

Meaning
a person who holds beliefs that go against established religious teachings or accepted beliefs.
Example
The church declared him a heretic for his radical ideas.
C1 adjective /ˈhɔːltɪŋ/

halting

Meaning
slow and hesitant, especially due to lack of confidence
Example
She gave a halting reply during the interview.
C1 noun /hʌl/

hull

Meaning
The outer covering of a seed or fruit; also the main body of a ship.
Example
The sailors inspected the ship’s hull for any damage.
C1 noun /ˈhed.weɪ/

Headway

Meaning
forward movement or progress, especially when this is slow or difficult
Example
Despite the challenges, the research team made significant headway in developing the new vaccine.
C1 noun /ˈhɔːrtɪˌkʌltʃər/

horticulture

Meaning
The art or practice of garden cultivation and management.
Example
Horticulture plays a vital role in producing fruits, vegetables, and ornamental plants.
C1 adverb /ˈhɑr.tɪ.li/

Heartily

Meaning
in a sincere and enthusiastic manner; wholeheartedly
Example
She heartily welcomed her guests to the party.
C1 noun /həˌluː.sɪˈneɪ.ʃən/

Hallucination

Meaning
an experience involving the apparent perception of something not present; a false or distorted perception
Example
The patient experienced visual hallucinations as a side effect of the medication.
C1 verb /ˈhaɪbərˌneɪt/

hibernate

Meaning
To spend the winter in a dormant state, as some animals do.
Example
Bears hibernate in caves during the winter.
C1 noun /hɑːrp/

Harp

Meaning
a large triangular musical instrument with strings that are plucked
Example
The angel played a beautiful melody on the harp.
C1 noun /hoʊks/

Hoax

Meaning
a humorous or malicious deception; something intended to trick or deceive people
Example
The news about aliens landing turned out to be an elaborate hoax created by pranksters.
C1 adverb /ˈheɪs.tɪ.li/

Hastily

Meaning
in a hurried or rushed manner; quickly and carelessly
Example
She hastily packed her bags before leaving for the airport.
C1 adjective /ˈhɛdˌstrɔŋ/

headstrong

Meaning
Determined to do what one wants, even if it is not sensible.
Example
The headstrong child refused to listen to anyone.
C1 noun /ˌhaɪ.roʊˈɡlɪf.ɪks/

hieroglyphics

Meaning
a system of writing using pictures or symbols, used especially by ancient Egyptians
Example
The tomb walls were covered with Egyptian hieroglyphics.
C1 noun /ˈheəˌkʌtər/

haircutter

Meaning
a person whose job is to cut and style hair; barber or hairdresser
Example
The haircutter gave me a neat and stylish haircut.
C1 noun /ˈhʌbʌb/

hubbub

Meaning
a loud noise caused by a crowd of people talking or shouting
Example
There was a hubbub in the market as the sale began.
C1 noun/verb /ˈhɛmərɪdʒ/

hemorrhage

Meaning
A significant loss of blood from a ruptured blood vessel, or to lose blood heavily.
Example
The patient suffered a severe brain hemorrhage.
C1 noun /haɪˈpɒθəsɪs/

hypothesis

Meaning
a proposed explanation made on the basis of limited evidence as a starting point for further investigation.
Example
The scientist tested her hypothesis through multiple experiments.
C1 adjective /ˈheɪ.nəs/

Heinous

Meaning
extremely wicked or evil; abominable; morally reprehensible
Example
The heinous crime shocked the entire community.
C1 adverb /ˈhʌŋ.ɡrə.li/

Hungrily

Meaning
in a way that shows hunger; greedily; eagerly
Example
The dog ate hungrily after not eating for hours.
C1 verb /ˈhæɡəl/

haggle

Meaning
to argue about the price; to bargain persistently
Example
They haggled over the price for an hour.
C1 noun /hɪˈpɑː.krə.si/

Hypocrisy

Meaning
the practice of claiming to have moral standards that one does not actually possess; insincerity
Example
His hypocrisy was exposed when he criticized others for the same mistakes he had made.