hazardous
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B2 adjective ˈhæzədəs

hazardous

Meaning
Dangerous, risky, or potentially harmful
Example
Hazardous pollutants increase health risks.
B1 adjective /hɪˈstɔːrɪkəl/

historical

Meaning
Related to history or past events.
Example
The museum has a large collection of historical documents.
C2 adjective /ˌhɪstriˈɒnɪk/

histrionic

Meaning
Overly dramatic or theatrical in behavior or style.
Example
Her histrionic reaction to the small problem surprised everyone.
C1 adjective ˌhaɪ.pəˈθet.ɪ.kəl

hypothetical

Meaning
Based on or serving as a hypothesis; supposed but not necessarily real or true.
Example
The discussion was based on hypothetical scenarios.
B1 noun /ˈhɔːlweɪ/

hallway

Meaning
a corridor in a building that connects rooms
Example
The kids left their shoes in the hallway.
C2 noun /hɪˈlærɪti/

hilarity

Meaning
Extreme amusement, especially when expressed by laughter.
Example
The movie caused great hilarity among the audience.
C2 noun /oʊˈtɜːr/

hauteur

Meaning
disdainful pride; arrogance
Example
His hauteur made it difficult for others to approach him.
B2 verb /ˈhezɪteɪt/

hesitate

Meaning
to pause before acting; to be uncertain about what to do
Example
Don't hesitate to ask for help.
B2 adjective /ˈhjuː.mər.əs/

Humorous

Meaning
funny; amusing; causing laughter;
Example
His humorous stories always make everyone laugh.
B2 noun /ˈheɪ.trəd/

Hatred

Meaning
intense dislike or ill will; a feeling of strong aversion
Example
His hatred for injustice motivated him to become a human rights lawyer.
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.
B2 noun /haɪˈdreɪʃən/

hydration

Meaning
The process of providing an adequate amount of liquid to bodily tissues.
Example
Proper hydration is essential for maintaining body functions.
C2 noun /ˌhɜːrpəˈtɒlədʒɪst/

herpetologist

Meaning
A scientist who studies reptiles and amphibians.
Example
The herpetologist discovered a new species of frog in the rainforest.
C2 noun /ˌhaɪdrəˈstætɪks/

hydrostatics

Meaning
The branch of science concerned with the mechanical properties of fluids at rest.
Example
Hydrostatics is essential in understanding how dams and reservoirs function.
C2 noun /ˌhaɪdroʊˈfoʊbiə/

hydrophobia

Meaning
Extreme or irrational fear of water; historically, another name for rabies.
Example
After being bitten by a stray dog, the man was treated for hydrophobia.
C2 verb /həˈbɪtʃuˌeɪt/

habituate

Meaning
to make someone accustomed to something
Example
The monks habituated themselves to meditation.
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.
C2 noun /ˈhɑːstəlri/

hostelry

Meaning
An inn or lodging place, especially one for travelers.
Example
They stayed at a small hostelry near the mountains.
C2 noun /hɜːrs/

Hearse

Meaning
a vehicle for conveying the coffin at a funeral; a funeral car
Example
The black hearse slowly made its way to the cemetery, followed by a procession of mourners.
B1 noun /hjuːˈmænɪti/

humanity

Meaning
the quality of being human; kindness or compassion towards others; all human beings collectively
Example
Kindness is one of the greatest expressions of humanity.
C2 verb /hjuː/

hew

Meaning
To chop or cut something, especially wood or stone, with a tool.
Example
The workers hewed logs to build the cabin.
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.
C2 noun /ˈhɛdʒɪrə/ or /hɪˈdʒaɪrə/

hegira

Meaning
a journey, especially when undertaken to escape from a dangerous or undesirable situation
Example
The refugees began their hegira across the desert.
A1 noun /help/

Help

Meaning
the action of helping someone to do something; assistance or support
Example
The volunteer offered his help to carry the elderly woman's groceries to her car.
C2 noun /haɪˈdrɒl.ɪ.sɪs/

hydrolysis

Meaning
A chemical process that breaks down compounds by adding water, splitting complex molecules into simpler forms.
Example
Hydrolysis breaks down complex molecules into simpler forms.
C2 noun /ˈhænd ˌrɪŋɪŋ/

hand-wringing

Meaning
excessive worry or concern expressed in a visible or dramatic way.
Example
There was much hand-wringing over the political crisis.
C2 noun /ˌhoʊ.mi.oʊˈsteɪ.sɪs/

homeostasis

Meaning
The tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.
Example
The human body maintains homeostasis through temperature regulation.
B2 adjective /hɪˈlɛəriəs/

hilarious

Meaning
Extremely funny or amusing.
Example
The comedian told a hilarious story that had everyone laughing.
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.
C2 adjective /ˌhɛtərəʊˈmɔːrfɪk/

heteromorphic

Meaning
Having different forms or shapes, especially in the same species or organism.
Example
Butterflies are heteromorphic during their life cycle, changing forms from larva to adult.
C1 adverb /ˈhed ɑn/

Head-on

Meaning
directly facing; in direct confrontation or collision
Example
The two cars collided head-on at the intersection.
B1 adjective /ˈhæn.səm/

handsome

Meaning
attractive in appearance, usually referring to men; also can mean generous or impressive in size.
Example
He looked very handsome in his new suit.
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.
C2 noun /ˈhɜːrmɪtɪdʒ/

hermitage

Meaning
A secluded residence or retreat, often for a hermit or religious recluse.
Example
The monk spent years in a hermitage deep in the forest.
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.
B2 noun /həˈraɪ.zənz/

horizons

Meaning
The limit of a person's mental perception, experience, or interest.
Example
The telescope opens new horizons for astronomy.
C2 noun /ˌhaɪdroʊdaɪˈnæmɪks/

hydrodynamics

Meaning
The branch of science concerned with the motion of fluids, especially liquids, and the forces acting on solid bodies immersed in fluids.
Example
Hydrodynamics is essential in designing efficient ship hulls.
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.
A2 noun /ˈherˌdrɛsər/

hairdresser

Meaning
a person whose job is to cut, style, and treat hair
Example
The hairdresser gave me a stylish haircut before the wedding.
C2 adjective /həˈrɛtɪkəl/

heretical

Meaning
Relating to or characterized by departure from accepted beliefs or standards, especially in religion.
Example
The priest condemned the book as heretical.
C2 verb /ˈhɑːbəl/

hobble

Meaning
to walk awkwardly with difficulty, usually due to injury
Example
He hobbled across the room after twisting his ankle.
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 /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 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.
C2 noun /ˈhɑːdɪhʊd/

hardihood

Meaning
Courage, boldness, or daring behavior; also physical robustness.
Example
The mountaineer's hardihood impressed the entire team.
A1 verb /hoʊld/

hold

Meaning
to grasp or carry something; to maintain a position
Example
Please hold my hand.
C2 adjective /hɛkˈsæŋɡjələr/

hexangular

Meaning
Having six angles or corners.
Example
The artist designed a hexangular frame for the mirror.
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.
B2 adjective /hɪˈstɛrɪkəl/

hysterical

Meaning
Extremely funny or uncontrollably emotional.
Example
The comedian's jokes were absolutely hysterical.
A1 adverb /haʊ/

how

Meaning
in what way or manner; by what means
Example
How do you solve this problem?
A1 noun /hɔːrs/

Horse

Meaning
a large domesticated mammal used for riding and pulling loads
Example
The horse galloped across the field with great speed.
B2 noun /ˈhɑːr.mə.ni/

harmony

Meaning
A pleasing combination of different elements or a state of peaceful coexistence.
Example
A society thrives when there is harmony among its people.
B2 adjective /ˈhaɪˌprəʊfaɪl/

high-profile

Meaning
having a lot of attention or public notice
Example
The CEO attended a high-profile conference in New York.
C2 verb /haɪˈpɒθɪkeɪt/

hypothecate

Meaning
to pledge something, such as property, as security for a debt without giving up possession of it.
Example
The company hypothecated its assets to secure the loan.
C1 adjective /həˈbɪtʃuəl/

habitual

Meaning
Done or doing constantly or as a habit; customary.
Example
He was a habitual latecomer to class.
B1 noun/verb /ˈhʌntɪŋ/

hunting

Meaning
the activity of chasing and killing wild animals
Example
Hunting is strictly regulated in many countries.
B1 noun /ˈhaɪdʒiːn/

hygiene

Meaning
Conditions or practices conducive to maintaining health and preventing disease.
Example
Good hygiene is essential for preventing the spread of infections.
C2 noun /ˈhaɪərlɪŋ/

hireling

Meaning
A person who works for payment only, often with little loyalty or principle.
Example
The mercenary was dismissed as just a hireling with no real loyalty.
C1 adjective /ˌhaɪ.drəˈpɒn.ɪk/

hydroponic

Meaning
Relating to the process of growing plants in sand, gravel, or liquid, with added nutrients but without soil.
Example
Hydroponic farming allows crops to grow without soil.
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.
B1 noun /ˈhʌntər/

hunter

Meaning
a person or animal that hunts animals for food or sport
Example
The hunter tracked the deer through the forest.
C2 noun /ˈhɔːrs.liːt͡ʃ/

Horse-leach

Meaning
a large species of leech that was traditionally used in veterinary medicine
Example
The veterinarian explained that horse-leach was once commonly used to treat horses.
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 /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.
B2 noun /haɪˈiː.nə/

Hyena

Meaning
a wild animal of Africa and Asia that looks like a dog and makes a sound like laughter
Example
The hyena laughed in the darkness of the night.
B2 noun /ˈhɔːr.ər/

Horror

Meaning
an intense feeling of fear, shock, or disgust; something that causes such feelings
Example
The survivors described the horror of the earthquake that destroyed their entire village.
B2 adjective; past participle /ˈɒnəd/

honoured

Meaning
treated with respect or distinction; feeling proud and privileged
Example
She felt deeply honoured to receive the award.
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.
B2 noun /ˈhɑːr.bər/

Harbour

Meaning
a place on the coast where vessels may find shelter; a place of safety or refuge
Example
The fishing boats returned safely to the harbour before the storm hit the coastline.
B2 noun /ˈhæs.əl/

Hassle

Meaning
irritating inconvenience; trouble or difficulty; a situation causing problems
Example
Booking tickets online can save you the hassle of waiting in long queues at the theater.
B2 adjective /ˈhɑlːoʊ/

Hollow

Meaning
having an empty space inside; lacking substance or meaning; insincere
Example
The hollow tree trunk provided shelter for small animals.
A2 noun /ˈhæn.dəl/

Handle

Meaning
the part by which a thing is held, carried, or controlled; to manage or deal with something
Example
The suitcase has a sturdy handle that makes it easy to carry through the airport.
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.
A1 noun, adjective /hæf/

half

Meaning
one of two equal parts of something
Example
He ate half of the cake.
A2 noun /hɛn/

Hen

Meaning
female chicken
Example
The hen laid fresh eggs in the nest.
B1 noun /ˈhaɪ.weɪ/

highway

Meaning
A main road, especially one connecting major towns or cities.
Example
The highway was blocked due to an accident.
C2 noun /ˈhʌk.stər/

huckster

Meaning
A person who sells small items aggressively, often in a showy or dishonest way.
Example
The huckster loudly promoted his goods in the busy marketplace.
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.
B2 noun ˈhɛr.ɪ.tɪdʒ

heritage

Meaning
Property that is or may be inherited; something transmitted by or acquired from a predecessor; cultural traditions and practices that are passed down.
Example
Bangladesh has a rich cultural heritage.
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.
B2 noun ˈhoʊmˌskuː.lɪŋ

homeschooling

Meaning
The practice of educating children at home rather than sending them to a school.
Example
Homeschooling allows parents to tailor education to their child's needs.
C1 adjective /hɪpˈnɒtɪk/

hypnotic

Meaning
Producing sleep or a trance-like state; mesmerizing.
Example
The music had a hypnotic effect on the audience.
B2 verb /ˈhɑːrnɪs/

harness

Meaning
To control and make use of natural resources, especially energy.
Example
Scientists are working to harness solar power effectively.
C2 adjective /heɪl/

hale

Meaning
strong and healthy, especially of an elderly person
Example
Despite his age, the man remained hale and active.
A1 noun, verb /hɛd/

head

Meaning
The upper part of the human body or to lead or be in charge of something.
Example
She turned her head to look out the window.
A2 verb /hʌnt/

hunt

Meaning
to chase and kill wild animals; to search for something
Example
The tigers hunt their prey at night.
B2 noun /ˈhaɪdrədʒən/

hydrogen

Meaning
a colorless, odorless, highly flammable gas that is the lightest and most abundant chemical element in the universe
Example
Hydrogen is used as a clean fuel in many energy systems.
B2 adjective /ˈhɑːrtˌbreɪkɪŋ/

Heartbreaking

Meaning
causing overwhelming distress; very sad or disappointing
Example
The documentary showed heartbreaking scenes of children in poverty.
C2 noun /ˈhaɪdrə/

hydra

Meaning
a many-headed serpent in Greek mythology; a problem that seems to grow worse when attempts are made to solve it
Example
Corruption is like a hydra, hard to defeat completely.
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.
A2 noun /hɑːrt/

Heart

Meaning
the organ in the chest that pumps blood through the body; the center of emotions and feelings
Example
The doctor listened to my heart with a stethoscope.
B1 verb /hiːl/

heal

Meaning
to cure; to become healthy again
Example
Time will heal all wounds.
A2 adjective /hjuːdʒ/

huge

Meaning
extremely large in size or amount
Example
The stadium was filled with a huge crowd.
C2 noun /ˈhɛksəˌpɒd/

hexapod

Meaning
An insect or other organism with six legs.
Example
The scientist observed a hexapod crawling on the leaf.
C2 noun /hɑrˈmoʊniəm/

Harmonium

Meaning
a keyboard musical instrument similar to an organ, using air to produce sound
Example
She played devotional songs on the harmonium at the temple.
C2 adjective /ˈhɔːrtətɔːri/

hortatory

Meaning
Intended to encourage or urge to action.
Example
The manager’s hortatory words inspired the team to work harder.
B2 adverb /hɛns/

hence

Meaning
for this reason; as a result
Example
She was the best candidate, hence she was chosen for the job.
C1 adjective /ˈhær.oʊ.ɪŋ/

harrowing

Meaning
extremely distressing or upsetting
Example
It was a harrowing experience to witness the accident.
A2 interjection /hʌ/

huh

Meaning
used to express confusion, surprise, or that you did not hear something
Example
Huh? What did you say?
C1 verb /ˈhɔːrɪfaɪ/

horrify

Meaning
to fill with horror; to shock or disgust greatly
Example
The violent scene horrified the audience.
C1 adverb /ˈhɒtli/

hotly

Meaning
in an intense, angry, or passionate way
Example
She hotly denied the accusations.
C1 noun ˌhaɪ.pɚˈten.ʃən

hypertension

Meaning
Abnormally high blood pressure.
Example
High sodium intake leads to hypertension.
B2 adjective haɪˈdʒiː.nɪk

hygienic

Meaning
Conducive to maintaining health and preventing disease, especially by being clean.
Example
Maintaining hygienic conditions in hospitals is crucial.
C2 verb /həˈræŋ/

harangue

Meaning
to deliver a long, passionate, and often angry speech
Example
The politician harangued the crowd for over an hour.
C1 noun /ˈhaɪndsaɪt/

hindsight

Meaning
Understanding of a situation only after it has happened.
Example
With the benefit of hindsight, we realized the decision was a mistake.
A2 noun /hɔːl/

Hall

Meaning
a large room for meetings, concerts, or other events; a corridor in a building
Example
The graduation ceremony was held in the main hall of the university.
A2 adverb /ˈɒnɪstli/

honestly

Meaning
in a truthful, sincere, or fair way
Example
She spoke honestly about her mistakes.
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.
C2 noun /ˈhʌvəl/

hovel

Meaning
a small, poorly built, and dirty house
Example
The refugees lived in a makeshift hovel.
A2 noun ˈhæpɪnəs

happiness

Meaning
The feeling or state of being happy; a pleasurable or satisfying experience; contentment and joy.
Example
Happiness lies in enjoying the small things in life.
A1 pronoun /hɪm/

him

Meaning
Used to refer to a male person or animal already mentioned.
Example
I saw him at the park yesterday.
C2 noun /hɜːrˈbɛəriəm/

herbarium

Meaning
A collection of preserved plant specimens and associated data used for scientific study.
Example
The university maintains a large herbarium for research and education.
A1 adverb /hɪr/

here

Meaning
in, at, or to this place
Example
Please come here quickly.
B2 adjective /hɪˈroʊɪk/

heroic

Meaning
showing great bravery or courage; relating to a hero or heroes
Example
The firefighter made a heroic effort to save the child.
B2 noun ˈhɑːrvɪstɪŋ

harvesting

Meaning
The process of gathering a ripe crop from the fields or collecting natural resources.
Example
Unregulated harvesting affects the biodiversity of oceans.
C2 adjective /ˈhed.i/

Heady

Meaning
having a strong or exhilarating effect; intoxicating; exciting
Example
The heady perfume of jasmine filled the garden.
C1 verb /hɜːrl/

hurl

Meaning
To throw something with great force.
Example
The boy hurled a stone into the river.
C1 adjective /ˈheɪ.nəs/

Heinous

Meaning
extremely wicked or evil; abominable; morally reprehensible
Example
The heinous crime shocked the entire community.
A1 noun /ˈhɒs.pɪ.təl/

hospital

Meaning
an institution where sick or injured people are given medical treatment
Example
He was taken to the hospital after the accident.
B2 adjective /ˈhɜː.bəl/

herbal

Meaning
Made from or containing herbs, especially for medicinal purposes.
Example
Herbal remedies were widely used here.
B1 noun /ˈhɪr.ɪŋ/

Hearing

Meaning
the faculty of perceiving sounds; a session in which testimony and arguments are heard
Example
The elderly man's hearing had deteriorated, so he needed to wear a hearing aid.