hydrogen
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
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.
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.
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 /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 /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.
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.
C2 noun /ˈhʌstɪŋz/

hustings

Meaning
the political campaigning and speeches before an election
Example
The candidate gained popularity during the hustings.
A2 adjective /ˈhelp.fəl/

Helpful

Meaning
giving or providing assistance; useful; beneficial
Example
She was very helpful in organizing the event.
A2 verb /hæŋ/

hang

Meaning
to suspend or be suspended from above; to attach from a higher point
Example
I hang my coat on the hook.
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.
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.
A1 adjective /ˈhæpi/

happy

Meaning
feeling or showing pleasure, contentment, or joy
Example
She was very happy to receive the gift.
C2 noun /haɪnd/

Hind

Meaning
a female deer, especially a red deer
Example
The hind protected her fawn from predators.
A1 pronoun /hɜːrz/

hers

Meaning
used to refer to something that belongs to or is associated with a female person previously mentioned or easily identified.
Example
That blue bag is hers.
B1 noun /ˈhæm.ər/

Hammer

Meaning
a tool with a heavy metal head for hitting nails or breaking things
Example
She used a hammer to nail the picture frame to the wall.
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.
B2 noun /ˈhænd.fʊl/

Handful

Meaning
a quantity that fills the hand; a small number or amount; something difficult to control
Example
She grabbed a handful of nuts from the bowl before heading out for her walk.
A1 noun /hæt/

Hat

Meaning
a covering for the head, typically with a brim and worn outdoors
Example
He always wears a hat when working in the garden.
C1 noun /ˈhɛksəˌɡɒn/

hexagon

Meaning
A six-sided polygon.
Example
A honeycomb cell is shaped like a hexagon.
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 /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 noun /ˈheɪvən/

haven

Meaning
a safe place or shelter
Example
The library became a haven for students during exams.
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.
B2 adjective /hɑːrʃ/

Harsh

Meaning
unpleasantly hard or rough in texture; cruel or severe
Example
The teacher gave harsh criticism about my work.
A1 noun, adjective /hæf/

half

Meaning
one of two equal parts of something
Example
He ate half of the cake.
B2 adjective /ˈhevənli/

Heavenly

Meaning
relating to heaven; extremely pleasant or beautiful
Example
The chocolate cake had a heavenly taste that melted in my mouth.
B2 noun /hɪp/

hip

Meaning
The part of the body on either side of the pelvis, or informal: trendy and fashionable.
Example
She put her hands on her hips.
C1 noun /ˈhɛzɪtəns/

hesitance

Meaning
The quality or state of being reluctant or uncertain.
Example
Her hesitance to speak up delayed the decision.
A1 verb /hæv/

have

Meaning
to possess, own, or hold
Example
They have three children.
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 /ˈhɑːt.biːt/

heartbeat

Meaning
A pulsation of the heart, especially as perceptible to the touch or audible with a stethoscope.
Example
Rubbing the eyes helps normalize the heartbeat.
A2 verb /hɪt/

hit

Meaning
to strike; to reach a target
Example
He hit the ball with the bat.
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.
C2 adjective /ˈhɔːrtətɔːri/

hortatory

Meaning
Intended to encourage or urge to action.
Example
The manager’s hortatory words inspired the team to work harder.
A2 adjective /ˈhɛl.θi/

healthy

Meaning
Good physical and mental condition, free from disease or illness.
Example
Regular exercise and a balanced diet keep the body healthy.
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.
B1 adverb /ˌhæfˈweɪ/

halfway

Meaning
at or to a point equal in distance between two points
Example
We met halfway between the two towns.
C2 noun /ˈhɪlək/

hillock

Meaning
A small hill or mound.
Example
The children climbed up the grassy hillock to watch the sunset.
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 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 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.
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.
B1 noun /ˈhʌŋɡər/

hunger

Meaning
the feeling of discomfort caused by lack of food
Example
The child cried out of hunger.
C2 adjective /ˌhæfˈhɑːr.tɪd/

halfhearted

Meaning
lacking enthusiasm or determination; unenthusiastic
Example
His halfhearted attempt to study did not bring good results.
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.
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.
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.
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 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 /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 verb /hɜːrl/

hurl

Meaning
To throw something with great force.
Example
The boy hurled a stone into the river.
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.
B1 verb /ˈhɛdɪŋ/

heading

Meaning
Moving in a particular direction.
Example
The ship is heading toward Antarctica.
B2 noun /ˈhændlɪŋ/

handling

Meaning
the act of managing or dealing with something or someone
Example
His handling of the situation was impressive.
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.
C1 adverb /ˈhɑr.tɪ.li/

Heartily

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

hinterland

Meaning
The remote or less developed areas away from the coast or a city.
Example
The farmers came from the rural hinterland to sell their produce in the city.
B2 adjective /ˈhjuː.mɪd/

Humid

Meaning
containing moisture; damp; moist;
Example
The humid climate makes it feel hotter than it actually is.
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.
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.
C1 noun /ˈhjuːbrɪs/

hubris

Meaning
excessive pride or self-confidence
Example
His hubris led to his downfall.
C2 adjective /haɪˈbɜːrnəl/

hibernal

Meaning
Relating to or occurring in winter.
Example
The hibernal season is often harsh in the mountains.
B2 adjective ˈhæzədəs

hazardous

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

honesty

Meaning
the quality of being truthful and sincere
Example
Honesty is the best policy in all situations.
B2 verb /ˈhezɪteɪt/

hesitate

Meaning
to pause before acting; to be uncertain about what to do
Example
Don't hesitate to ask for help.
C1 verb /hiːd/

heed

Meaning
to pay attention to; to take notice of
Example
You should heed the teacher's advice.
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.
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.
B2 noun, verb /ˈhɑːrbər/

harbor

Meaning
noun: a place on the coast where ships may find shelter; verb: to keep (a thought or feeling, often negative) in one's mind
Example
He continued to harbor resentment towards his former boss.
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.
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.
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 /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.
B2 verb /hæk/

hack

Meaning
to cut or chop roughly; to gain unauthorized access to a computer system
Example
The programmer managed to hack into the system.
A1 verb /hɪər/

hear

Meaning
to perceive sound; to listen to
Example
I can hear the birds singing.
B2 noun /hʌm/

Hum

Meaning
a low continuous sound; to make a low continuous droning sound
Example
The constant hum of the air conditioner helped her fall asleep peacefully.
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.
C2 verb /həˈbɪtʃuˌeɪt/

habituate

Meaning
to make someone accustomed to something
Example
The monks habituated themselves to meditation.
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 /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.
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 verb /ˈhɛnˌpɛk/

henpeck

Meaning
To continually criticize, nag, or dominate (especially a husband).
Example
He felt henpecked by his overly controlling wife.
B1 verb /haɪər/

hire

Meaning
to employ someone for wages; to rent or engage services
Example
The company will hire new employees next month.
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 /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.
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.
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 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.
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.
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.
A2 verb /hɑːrm/

harm

Meaning
to cause damage, injury, or hurt to someone or something
Example
Smoking can harm your health.
A1 verb /hoʊld/

hold

Meaning
to grasp or carry something; to maintain a position
Example
Please hold my hand.
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 /ˈhæn.di.krɑːft/

Handicraft

Meaning
an activity involving the making of decorative domestic or other objects with the hands; handmade artistic work
Example
The local market featured beautiful handicrafts made by skilled artisans from the region.
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.
B1 adverb /ˈhaɪli/

highly

Meaning
to a great degree; very
Example
She is highly respected in her field.
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 /ˌhɜːrpəˈtɒlədʒɪst/

herpetologist

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

hexangular

Meaning
Having six angles or corners.
Example
The artist designed a hexangular frame for the mirror.
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.
B2 noun /ˈhaʊs boʊt/

House boat

Meaning
a boat that has been designed or modified to be used primarily as a home
Example
They spent their vacation on a beautiful house boat in the lake.
B2 adjective /ˈhɪli/

hilly

Meaning
having many hills; characterized by hills or slopes
Example
The village is located in a beautiful hilly region.
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.
A2 noun /ˈhɛlɪˌkɒptər/

helicopter

Meaning
an aircraft with rotating blades that can take off and land vertically
Example
The helicopter landed safely on the hospital roof.
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/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 /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 adjective /ˈhɪd.ən/

Hidden

Meaning
concealed from view; kept secret; not visible or apparent
Example
There was a hidden camera in the room.
B1 noun /ˈhændˌraɪ.tɪŋ/

handwriting

Meaning
the style or manner of writing by hand.
Example
Her handwriting is very neat and easy to read.
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.
C2 adjective/noun /haɪˈbɜːrniən/

hibernian

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

hindmost

Meaning
Farthest back; last in position.
Example
The hindmost car in the convoy broke down first.
B2 adjective /ˈhɒs.taɪl/

Hostile

Meaning
unfriendly; aggressive; antagonistic;
Example
The hostile environment made it difficult to work.
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 /ˈhɛptɑːrki/

heptarchy

Meaning
A group of seven rulers or governments, especially the seven Anglo-Saxon kingdoms in early England.
Example
The history book described the heptarchy of Anglo-Saxon England.
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 adverb, conjunction /haʊˈɛvər/

however

Meaning
used to introduce a statement that contrasts with or seems to contradict something previously said
Example
The journey was long; however, it was enjoyable.
C1 noun /ˈhɜːrbɪsaɪd/

herbicide

Meaning
A chemical substance used to kill unwanted plants, especially weeds.
Example
Farmers used herbicide to protect their crops from invasive weeds.
B1 noun ˌhjuː.mən ˈraɪts

human rights

Meaning
A right that is believed to belong justifiably to every person.
Example
Human rights protect individual freedoms.