hypothesis
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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.
B1 verb /hʊk/

hook

Meaning
to catch with a hook; to fasten
Example
He hooked the fish successfully.
C2 noun /ˈhɑːstəlri/

hostelry

Meaning
An inn or lodging place, especially one for travelers.
Example
They stayed at a small hostelry near the mountains.
B2 adjective /hɑːˈspɪtəbəl/

Hospitable

Meaning
friendly and welcoming to strangers or guests; generous in receiving guests
Example
The local people were very hospitable to the tourists.
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.
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.
B2 noun /ˈhæb.ɪ.tæt/

habitat

Meaning
The natural environment where an organism lives and meets its needs.
Example
The polar bear's natural habitat is the Arctic region.
B1 verb /hiːl/

heal

Meaning
to cure; to become healthy again
Example
Time will heal all wounds.
C2 noun /ˈhɔːθɔːrn/

hawthorn

Meaning
A thorny shrub or small tree with white or pink flowers, often used for hedges.
Example
The garden was lined with blooming hawthorn bushes.
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.
C2 noun /ˌhaɪpəkəˈnektɪvɪti/

hyperconnectivity

Meaning
The state of being extensively connected to other people, places, information, etc., through digital technology.
Example
Hyperconnectivity has changed the dynamics of human interaction.
C2 verb /ˈhɛnˌpɛk/

henpeck

Meaning
To continually criticize, nag, or dominate (especially a husband).
Example
He felt henpecked by his overly controlling wife.
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.
C1 adjective /ˈhɑːrtˌrɛndɪŋ/

heartrending

Meaning
Causing great sadness or distress; very moving emotionally.
Example
The documentary showed heartrending scenes of war victims.
C2 noun /ˈhɑːdɪhʊd/

hardihood

Meaning
Courage, boldness, or daring behavior; also physical robustness.
Example
The mountaineer's hardihood impressed the entire team.
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 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.
A2 verb /hɪt/

hit

Meaning
to strike; to reach a target
Example
He hit the ball with the bat.
B1 noun /ˈhaʊzɪŋ/

housing

Meaning
buildings or structures where people live; accommodation
Example
The government is working to provide affordable housing for everyone.
B1 noun/verb /hɪnt/

hint

Meaning
a small piece of advice or suggestion; to suggest something indirectly
Example
She gave me a hint about the surprise party.
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.
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.
C1 adverb /ˌhɛdˈfɜrst/

headfirst

Meaning
With the head leading; in a reckless or hasty manner.
Example
He dived headfirst into the pool.
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.
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 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 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.
C2 noun /ˈhɔːzər/

hawser

Meaning
A thick rope or cable used in mooring or towing a ship.
Example
The sailors secured the ship to the dock with a heavy hawser.
C2 noun /ˈhɛklər/

heckler

Meaning
A person who interrupts a speaker with rude or aggressive comments.
Example
The politician remained calm despite the heckler shouting from the crowd.
B2 noun/verb /hɜːrd/

herd

Meaning
a large group of animals of the same type that live and feed together; or to gather animals into a group.
Example
The shepherd herded the sheep into the pen.
C2 noun, verb /ˈhæmstrɪŋ/

hamstring

Meaning
a tendon at the back of the thigh; as a verb, to cripple or severely restrict the effectiveness of someone or something.
Example
Budget cuts hamstrung the organization’s plans.
C2 verb /haɪ/

hie

Meaning
to go quickly; hasten
Example
He hied to the station to catch the train.
B2 adjective /hɑːrˈmoʊ.ni.əs/

harmonious

Meaning
Characterized by agreement or concord; forming a pleasing or consistent whole.
Example
A harmonious work environment boosts productivity.
A2 noun /hɒt drɪŋk/

Hot-drink

Meaning
a warm or heated beverage consumed for refreshment or comfort
Example
I prefer a hot drink like tea or coffee in the morning.
A2 adjective /ˈɑːnɪst/

honest

Meaning
free of deceit and untruthfulness; sincere
Example
She is known as an honest and trustworthy person.
A2 interjection /hʌ/

huh

Meaning
used to express confusion, surprise, or that you did not hear something
Example
Huh? What did you say?
C2 noun /ˈhɪlək/

hillock

Meaning
A small hill or mound.
Example
The children climbed up the grassy hillock to watch the sunset.
B2 adjective /ˌhaɪ ˈtɛk/

high-tech

Meaning
using or involving advanced technology.
Example
The company produces high-tech medical devices.
A2 noun ˈhɪrəʊ

hero

Meaning
A person who is admired or idealized for courage, outstanding achievements, or noble qualities.
Example
Sydney Carton becomes the ultimate hero through his sacrifice.
C2 noun /hɔːɡ plʌm/

Hog plum

Meaning
tropical fruit with yellow skin and sour taste
Example
Hog plums are often used to make pickles and chutneys.
B1 noun /hel/

Hell

Meaning
a place regarded in various religions as a spiritual realm of evil and suffering; an extremely unpleasant experience
Example
Working in the factory during summer was absolute hell due to the extreme heat.
B2 noun /hoʊm ˈdɪstrɪkt/

home district

Meaning
the district where a person was born or originally comes from
Example
He returned to his home district after many years abroad.
C2 adjective /hɜːrˈbeɪʃəs/

herbaceous

Meaning
Relating to or resembling herbs; plants with soft, non-woody stems.
Example
The garden was filled with herbaceous plants that thrived in the summer.
B1 noun /ˈhɛlθˌkɛər/

health-care

Meaning
the organized provision of medical services to maintain or improve health
Example
Access to quality health-care is essential for every citizen.
C1 adverb /ˈhed ɑn/

Head-on

Meaning
directly facing; in direct confrontation or collision
Example
The two cars collided head-on at the intersection.
C2 adjective /ˈhæm ˌhændɪd/

ham-handed

Meaning
clumsy or inept in handling things or situations
Example
His ham-handed attempt to fix the computer made it worse.
A2 noun /ˈhæb.ɪt/

habit

Meaning
A settled or regular tendency or practice, especially one that is hard to give up.
Example
Eye rubbing is a harmful habit.
C2 noun /ˈhæŋ.kər.ɪŋ/

hankering

Meaning
a strong desire or craving for something.
Example
She had a hankering for chocolate late at night.
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 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.
B2 adverb /ˈhev.ɪ.li/

Heavily

Meaning
with great weight; to a great degree; intensely
Example
It rained heavily throughout the night.
B1 noun /ˈhaʊswaɪf/

housewife

Meaning
a married woman who manages a household and whose main occupation is caring for her family and home
Example
She chose to work as a housewife while raising her children.
B1 noun /ˈhɛdˌlaɪn/

headline

Meaning
The title of a newspaper article printed in large letters.
Example
The scandal made front-page headlines.
C2 adjective /hərˈmɛtɪk/

hermetic

Meaning
Completely sealed, especially so that no air can enter or escape.
Example
The medicine was kept in a hermetic container.
C2 adjective hjʊˈrɪs.tɪk

heuristic

Meaning
Enabling a person to discover or learn something for themselves; experimental learning approach.
Example
Teachers use heuristic techniques to encourage self-learning.
C1 verb /ˈhæɡəl/

haggle

Meaning
to argue about the price; to bargain persistently
Example
They haggled over the price for an hour.
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 /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.
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.
A2 noun /haɪt/

height

Meaning
the measurement of someone or something from base to top
Example
The height of the tower impressed the visitors.
A1 noun /ˈhoʊmwɜːrk/

homework

Meaning
schoolwork that a student does at home
Example
I need to finish my math homework before dinner.
B2 adverb /hɪˈstɒrɪkli/

historically

Meaning
in a way that relates to history or past events
Example
Historically, this city was a major trade center.
B1 adjective /ˈhoʊmləs/

homeless

Meaning
Without a home, and therefore typically living on the streets.
Example
The organization helps homeless people find shelter.
B2 noun /ˌhez.ɪˈteɪ.ʃən/

Hesitation

Meaning
the action of pausing or delaying; uncertainty or unwillingness to act
Example
After a moment of hesitation, she decided to accept the challenging job offer from the company.
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 /hɪˈstɛrɪkəl/

hysterical

Meaning
Extremely funny or uncontrollably emotional.
Example
The comedian's jokes were absolutely hysterical.
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.
B1 adverb /ˈhaɪli/

highly

Meaning
to a great degree; very
Example
She is highly respected in her field.
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 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.
C2 adjective/noun /ˌhaɪərəˈɡlɪfɪk/

hieroglyphic

Meaning
Relating to or written in hieroglyphs; symbols or writing that is difficult to understand.
Example
The archaeologists studied the hieroglyphic inscriptions carefully.
C2 noun /ˌhjuː.mɪ.fɪˈkeɪ.ʃən/

humification

Meaning
The process of organic matter decomposition to form humus in soil.
Example
Humification enhances soil structure and fertility.
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/verb /ˈhɛrəld/

herald

Meaning
A person or thing that announces or signals the approach of something; to announce or signal.
Example
The blooming flowers herald the arrival of spring.
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 noun ˌhaɪ.pɚˈten.ʃən

hypertension

Meaning
Abnormally high blood pressure.
Example
High sodium intake leads to hypertension.
B2 adjective /ˈhjuː.mɪd/

Humid

Meaning
containing moisture; damp; moist;
Example
The humid climate makes it feel hotter than it actually is.
A2 noun /ˈhɑː.bi/

Hobby

Meaning
an activity done regularly in one's leisure time for pleasure; a pastime or recreation
Example
Photography became her favorite hobby after she received a camera for her birthday.
A1 adjective /ˈhæpi/

happy

Meaning
feeling or showing pleasure, contentment, or joy
Example
She was very happy to receive the gift.
B2 adjective /hoʊˈlɪs.tɪk/

holistic

Meaning
Understanding or analyzing something through a comprehensive, integrated whole perspective.
Example
A holistic approach to health considers both body and mind.
C1 verb /hiːd/

heed

Meaning
to pay attention to; to take notice of
Example
You should heed the teacher's advice.
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 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.
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.
C2 noun /hɪˈlærɪti/

hilarity

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

heterodox

Meaning
not conforming with accepted or orthodox standards or beliefs
Example
The professor was known for his heterodox views on religion.
C2 verb /ˈhɜːrtl/

hurtle

Meaning
To move or cause to move at great speed, often in a dangerous way.
Example
The car hurtled down the mountain road.
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 verb /ˈhɔːrɪfaɪ/

horrify

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

hector

Meaning
To talk to someone in a bullying or intimidating way.
Example
The manager hectored the staff into working overtime.
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.
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.
A1 noun, numeral /ˈhʌndrəd/

hundred

Meaning
the number 100
Example
There are a hundred students in the hall.
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.
B2 noun /hʊd/

Hood

Meaning
the expandable neck region of certain snakes like cobras; a covering for the head
Example
The cobra spread its hood when it felt threatened.
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.
C2 noun /ˈhɑːtʃ.pɑːtʃ/

Hotchpotch

Meaning
a confused mixture; a jumbled assortment of things
Example
The room was a hotchpotch of old furniture, books, and random decorations.
A1 pronoun /hɪz/

his

Meaning
belonging to or associated with a male person previously mentioned
Example
This is his book on the table.
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 /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.
B1 noun /ˈhev.ən/

Heaven

Meaning
a place regarded in various religions as the abode of God and the angels; a place of eternal happiness
Example
Many people believe that good souls go to heaven after they pass away from this world.
C1 adjective /ˌhɒməˈdʒiːniəs/

homogeneous

Meaning
Of the same kind; alike.
Example
The team was not homogeneous in their skills.
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 adjective /həˈbɪtʃuəl/

habitual

Meaning
Done or doing constantly or as a habit; customary.
Example
He was a habitual latecomer to class.
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.
B2 noun ˈhæb.ɪt fɔːrˌmeɪ.ʃən

habit formation

Meaning
The process of creating a habit through regular practice and repetition.
Example
Habit formation requires consistency and discipline.
C2 adjective /ˈhoʊm.spʌn/

homespun

Meaning
Simple and unsophisticated; made at home rather than in a factory.
Example
She wore a homespun dress to the village festival.
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 adverb /ˈhʌŋ.ɡrə.li/

Hungrily

Meaning
in a way that shows hunger; greedily; eagerly
Example
The dog ate hungrily after not eating for hours.
C2 noun /ˈhɒɡz.hɛd/

hogshead

Meaning
A large cask or barrel, traditionally used for storing liquids like wine or beer.
Example
The cellar was filled with hogsheads of ale.
C1 verb /hjuːˈmɪlieɪt/

humiliate

Meaning
to make someone feel ashamed or foolish by injuring their dignity
Example
He was humiliated by his public failure.
C2 noun /ˈhɑː.mə.li/

Homily

Meaning
a religious discourse delivered as part of a church service; a tedious moralizing lecture
Example
The priest delivered an inspiring homily about compassion and forgiveness during Sunday service.
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.
B2 adjective /ˈhez.ɪ.tənt/

Hesitant

Meaning
uncertain or unwilling to act; showing doubt or reluctance
Example
She was hesitant to accept the job offer.
B2 adjective /ˈhjuː.mər.əs/

Humorous

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

horizon

Meaning
the line where the earth seems to meet the sky; the limit of one's knowledge, experience, or interest
Example
The sun disappeared below the horizon.
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.
B2 noun /hɔːk/

Hawk

Meaning
a bird of prey with broad wings and strong talons used for hunting
Example
The hawk soared high above the field hunting for prey.
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.