halcyon
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C2 adjective /ˈhæl.si.ən/

halcyon

Meaning
calm, peaceful, and happy; denoting a period of time in the past that was idyllically happy and peaceful
Example
She often reminisces about the halcyon days of her childhood.
C2 noun /ˌhɛtərəʤəˈniːɪti/

heterogeneity

Meaning
the quality or state of being diverse in character or content
Example
The cultural heterogeneity of the city makes it vibrant and unique.
C2 verb /ˈhæloʊ/

hallow

Meaning
to honor as holy; to make sacred or greatly respected
Example
The ancient temple was hallowed by centuries of worship.
C2 noun /ˈhækəlz/

hackles

Meaning
the hairs on the back of an animal’s neck that rise when it is angry or alarmed; figuratively, feelings of anger or resentment
Example
His rude comment raised my hackles.
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 noun /ˈhaɪərəˌɡlɪf/

hieroglyph

Meaning
A picture or symbol used in ancient writing systems, especially Egyptian writing.
Example
The walls of the temple were covered in hieroglyphs.
C2 noun /ˈhæŋ.kər/

Hanker

Meaning
a feeling of yearning or craving; a strong desire for something
Example
After years abroad, she developed a deep hanker for her homeland's traditional cuisine.
C2 noun /haɪnd/

Hind

Meaning
a female deer, especially a red deer
Example
The hind protected her fawn from predators.
C2 noun /hʊˈzɑːr/

hussar

Meaning
a member of a light cavalry regiment in European armies, especially the Hungarian cavalry
Example
The hussar rode swiftly across the battlefield.
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 noun phrase /ˌhjuː ən ˈkraɪ/

hue and cry

Meaning
A loud public outcry or protest, often demanding action.
Example
There was a hue and cry over the new policy changes.
C2 adjective /ˈhiːðənɪʃ/

heathenish

Meaning
Lacking culture or religion; barbaric or uncivilized.
Example
They considered the ancient tribe’s rituals heathenish.
C2 noun /ˈheɪ.deɪ/

Hey day

Meaning
the period of a person's or thing's greatest success, popularity, or vigor; prime time
Example
During her heyday as a singer, she performed in sold-out concerts around the world.
C2 noun /ˌɒnəˈreəriəm/

honorarium

Meaning
A payment given for professional services that are rendered without a fee.
Example
The guest lecturer received an honorarium for her talk.
C2 noun /hɪˈlærɪti/

hilarity

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

humbug

Meaning
Deceptive or false talk or behavior; nonsense.
Example
He dismissed the idea as humbug.
C2 noun /ˈhoʊʒəri/

hosiery

Meaning
Stockings, socks, and other knitted clothing for the legs and feet.
Example
She bought new hosiery for the winter season.
C2 noun /ˈhɪlək/

hillock

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

harried

Meaning
feeling strained or stressed due to being overworked or constantly bothered
Example
The harried teacher struggled to calm the noisy classroom.
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.
C2 adjective /ˈhɔːri/

hoary

Meaning
gray or white with age; very old and respected
Example
The hoary oak tree stood as a witness to centuries of history.
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.
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 adjective /ˌhɪstriˈɒnɪk/

histrionic

Meaning
Overly dramatic or theatrical in behavior or style.
Example
Her histrionic reaction to the small problem surprised everyone.
C2 verb /həˈræŋ/

harangue

Meaning
to deliver a long, passionate, and often angry speech
Example
The politician harangued the crowd for over an hour.
C2 adjective /ˈhaɪd.baʊnd/

hidebound

Meaning
unwilling or unable to change because of tradition or convention
Example
He is too hidebound to accept new ideas.
C2 noun /ˈhɛʃ.ən/

Hessian

Meaning
a strong coarse fabric made from jute or hemp, used for sacks and wrapping
Example
The farmer stored grain in hessian sacks.
C2 noun /ˈhæk.ni ˈkær.ɪdʒ/

Hackney carriage

Meaning
A taxi; a car licensed to carry passengers for hire
Example
I called a hackney carriage to get to the airport.
C2 adjective /hɛkˈsæŋɡjələr/

hexangular

Meaning
Having six angles or corners.
Example
The artist designed a hexangular frame for the mirror.
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.
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.
C2 adjective /ˈhɜːrsuːt/

hirsute

Meaning
Having a lot of hair, especially in an unusual place.
Example
The hirsute man stood out in the crowd with his long beard.
C2 verb /ˈhɑːbəl/

hobble

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

hackney

Meaning
a horse kept for ordinary riding or hire; also used for something overused or trite
Example
The old hackney was still pulling the carriage.
C2 noun /ˈhoʊl.stər/

holster

Meaning
A holder or case for carrying a gun, typically worn on a belt or shoulder.
Example
The sheriff kept his revolver in a leather holster.
C2 noun /ˈhæbɪtjuːd/

habitude

Meaning
a customary condition or mode of life; habitual practice
Example
He lived in a quiet habitude, avoiding the noise of the city.
C2 noun /ˈhɪl.sə fɪʃ/

Hilsa fish

Meaning
a popular fish species found in South Asian rivers, especially prized in Bengali cuisine
Example
Hilsa fish is considered a delicacy in Bengali culture.
C2 noun /ˈhelmz.mən/

Helmsman

Meaning
a person who steers a ship or boat; the person at the helm of a vessel
Example
The experienced helmsman skillfully guided the yacht through the narrow channel during the storm.
C2 noun /ˌhaɪdroʊməˈkænɪks/

hydromechanics

Meaning
The study of the mechanical properties and behavior of fluids in motion and at rest.
Example
Hydromechanics provides the foundation for naval architecture.
C2 verb /ˈhɑːrtən/

hearten

Meaning
To give courage, confidence, or hope.
Example
The teacher’s encouragement heartened the students.
C2 adjective /həˈmɑː.lə.ɡəs/

homologous

Meaning
Having the same relation, relative position, or structure, especially due to evolutionary origin.
Example
The wings of bats and the arms of humans are homologous structures.
C2 adjective /ˈhʌmdrʌm/

humdrum

Meaning
Lacking excitement or variety; dull and monotonous.
Example
She grew tired of the humdrum routine of office life.
C2 noun /ˈhʌstɪŋz/

hustings

Meaning
the political campaigning and speeches before an election
Example
The candidate gained popularity during the hustings.
C2 noun /ˈhʌvəl/

hovel

Meaning
a small, poorly built, and dirty house
Example
The refugees lived in a makeshift hovel.
C2 noun /hæɡ/

Hag

Meaning
an ugly old woman, especially a vicious or malicious one; a witch
Example
In the fairy tale, the wicked hag lived alone in a cottage deep in the forest.
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.
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.
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 verb /ˈhɛnˌpɛk/

henpeck

Meaning
To continually criticize, nag, or dominate (especially a husband).
Example
He felt henpecked by his overly controlling wife.
C2 noun /hɒtʃ pɒtʃ/

Hotch potch

Meaning
A mixed dish; a hodgepodge of ingredients cooked together
Example
She made a delicious hotch potch with rice, lentils, and vegetables.
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 adjective /ˈhaɪndmoʊst/

hindmost

Meaning
Farthest back; last in position.
Example
The hindmost car in the convoy broke down first.
C2 adverb /hərˈmɛtɪkli/

hermetically

Meaning
In a way that is completely airtight or sealed off.
Example
The jars were hermetically sealed to preserve freshness.
C2 adjective/noun /haɪˈbɜːrniən/

hibernian

Meaning
Relating to Ireland or the Irish.
Example
He enjoyed reading about Hibernian culture and history.
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.
C2 adjective /ˌhaɪpərˈbɔːriən/

hyperborean

Meaning
Relating to the extreme north; very cold or frigid.
Example
The explorers prepared for the hyperborean climate of the Arctic.
C2 noun /ˈhɑːr.bɪn.dʒər/

Harbinger

Meaning
a person or thing that announces or signals the approach of another; a forerunner of something
Example
The first robin of spring is often considered a harbinger of warmer weather to come.
C2 adjective /ˈhæŋ.dɔːɡ/

hangdog

Meaning
looking or feeling ashamed, guilty, or defeated.
Example
He gave me a hangdog look after being caught lying.
C2 noun /ˈhɔːrn.bɪl/

Hornbill

Meaning
a large tropical bird with a large curved beak and often a horn-like projection
Example
The colorful hornbill perched on the highest branch.
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.
C2 noun /ˌhaɪpəˈkɒndrɪæk/

hypochondriac

Meaning
a person who is excessively worried about having a serious illness
Example
She is a hypochondriac who visits the doctor every week.
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.
C2 noun ˈhɑːrbərɪdʒ

harborage

Meaning
A place of shelter or refuge for pests or animals.
Example
Pests need a harborage site to survive and breed.
C2 verb /həˈbɪtʃuˌeɪt/

habituate

Meaning
to make someone accustomed to something
Example
The monks habituated themselves to meditation.
C2 adjective /ˈhaɪˌbraʊ/

highbrow

Meaning
intellectually superior or cultured; often describing art, literature, or activities appealing to intellectual tastes
Example
The museum is known for its highbrow exhibitions.
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.
C2 noun /ˌhæŋ.ər ˈɒn/

hanger-on

Meaning
a person who spends time with a powerful or famous person to gain benefits.
Example
The celebrity was always surrounded by hangers-on.
C2 verb /həˈmɑː.dʒə.naɪz/

homogenize

Meaning
To make uniform or similar by blending or mixing different elements.
Example
The company tried to homogenize its products across global markets.
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.
C2 verb /ˈhæri/

harry

Meaning
to constantly attack, harass, or annoy
Example
The army harried the enemy with sudden raids.
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 /hæp/

hap

Meaning
luck, fortune, or chance occurrence
Example
By sheer hap, he discovered the old letter hidden in the drawer.
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.
C2 adjective /heɪl/

hale

Meaning
strong and healthy, especially of an elderly person
Example
Despite his age, the man remained hale and active.
C2 verb /ˈhʊdwɪŋk/

hoodwink

Meaning
To deceive or trick someone.
Example
The scammer hoodwinked many people with false promises.
C2 noun /ˈhɔɪdən/

hoyden

Meaning
a boisterous or tomboyish girl
Example
The hoyden preferred climbing trees to playing with dolls.
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 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.
C2 noun /ˈhɛksəˌpɒd/

hexapod

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

hypodermic

Meaning
relating to the region immediately beneath the skin; also refers to a type of needle or syringe used to inject drugs beneath the skin.
Example
The doctor used a hypodermic needle to administer the vaccine.
C2 noun /ˈhɛptəˌɡɒn/

heptagon

Meaning
A polygon with seven sides and seven angles.
Example
The math teacher drew a heptagon on the board.
C2 noun /ˈhɔːtɪnəs/

haughtiness

Meaning
The appearance or quality of being arrogantly superior and disdainful.
Example
His haughtiness made him unpopular among his peers.
C2 verb (past tense, past participle), adjective /ˈhæmstrʌŋ/

hamstrung

Meaning
crippled or severely restricted in movement or progress.
Example
The team was hamstrung by lack of resources.
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 noun /hʌsk/

husk

Meaning
the dry outer covering of some fruits or seeds
Example
The corn husk was peeled away before cooking.
C2 verb /ˈhɑːrpɪŋ/

harping

Meaning
continuously talking or complaining about something in a tiresome way
Example
She kept harping on about the mistakes I made.
C2 noun /ˈhjuːməs/

humus

Meaning
The dark, organic material in soil formed from decayed plants and animals.
Example
The gardener enriched the soil with humus to improve plant growth.
C2 noun /ˈhæbɪtənt/

habitant

Meaning
An inhabitant; a person or animal that lives in a particular place.
Example
The habitants of the village were friendly and welcoming.
C2 noun /ˌhoʊmə.dʒəˈniːəti/

homogeneity

Meaning
The quality or state of being all the same or all of the same kind.
Example
The cultural homogeneity of the village made it feel unified.
C2 adjective /hɪk/

Hick

Meaning
unsophisticated person from a rural area; country bumpkin
Example
He had a hick accent from growing up in a small town.
C2 noun /ˈhaʊsˌbreɪkɪŋ/

housebreaking

Meaning
the crime of breaking into a house with intent to steal
Example
The thief was arrested for housebreaking.
C2 noun /ˈhɒthɛd/

hothead

Meaning
a person who acts quickly and without thinking when angry
Example
He is such a hothead that he often starts arguments.
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.
C2 noun /ˈhɑːdɪhʊd/

hardihood

Meaning
Courage, boldness, or daring behavior; also physical robustness.
Example
The mountaineer's hardihood impressed the entire team.
C2 adjective /ˌhɜːrkjʊˈliːən/

herculean

Meaning
Requiring great strength or effort; very difficult to perform.
Example
It was a herculean task to rebuild the city after the disaster.
C2 noun /hɪˈdʒɛməni/ or /ˈhɛdʒəmoʊni/

hegemony

Meaning
leadership or dominance, especially by one state or group over others
Example
The empire maintained its hegemony over neighboring states.
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.
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.
C2 noun /ˈhen.ə/

Henna

Meaning
a reddish-brown dye made from the powdered leaves of a tropical shrub, used to color hair and decorate skin
Example
The bride's hands were beautifully decorated with intricate henna patterns for her wedding ceremony.
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.
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.
C2 adjective /ˌhaɪ ˈfloʊn/

high-flown

Meaning
Using fancy or pretentious language; lofty in style but often overblown.
Example
The politician gave a high-flown speech full of promises.
C2 noun ˌhiː.məˈfɪl.i.ə

hemophilia

Meaning
A medical condition in which the ability of the blood to clot is severely reduced, causing the sufferer to bleed severely from even a slight injury.
Example
Hemophilia treatment benefits from genetic editing.
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.
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 adjective /haɪˈbɜːrnəl/

hibernal

Meaning
Relating to or occurring in winter.
Example
The hibernal season is often harsh in the mountains.
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.
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 /ˌhɜːrpəˈtɒlədʒɪst/

herpetologist

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

hodgepodge

Meaning
A confusing mixture of different things; a jumble.
Example
The essay was a hodgepodge of unrelated ideas.
C2 noun /ˌhæŋ.ki ˈpæŋ.ki/

Hanky-Panky

Meaning
dishonest or suspicious activity; unethical behavior; trickery or deception
Example
The audit revealed some hanky-panky in the company's financial records.
C2 noun /ˈhæŋ.kər.ɪŋ/

hankering

Meaning
a strong desire or craving for something.
Example
She had a hankering for chocolate late at night.
C2 verb /ˈhæroʊ/

harrow

Meaning
to cause distress or torment; also to break up and smooth soil with a farm tool
Example
The tragic news harrowed the entire family.
C2 adjective /ˈhaɪdrəs/

hydrous

Meaning
Containing water, especially water of crystallization.
Example
The mineral is hydrous because it contains water molecules in its structure.
C2 noun /ˈhʌm.ək/

hummock

Meaning
A small hill, mound, or ridge of earth or ice.
Example
The hikers rested on a grassy hummock by the river.
C2 adjective /ˈhed.i/

Heady

Meaning
having a strong or exhilarating effect; intoxicating; exciting
Example
The heady perfume of jasmine filled the garden.
C2 adjective /ˈhɔːrtətɪv/

hortative

Meaning
Giving strong encouragement or urging.
Example
The teacher gave a hortative speech to motivate the students before the exam.