Hollow
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B2 adjective /ˈhɑlːoʊ/

Hollow

空洞; 中身がない;
Meaning
having an empty space inside; lacking substance or meaning; insincere
Example
The hollow tree trunk provided shelter for small animals.
空洞の木の幹は小さな動物に避難場所を提供しました。
A2 noun /ˈhæn.dəl/

Handle

取っ手; 握り手; 扱う
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.
スーツケースには空港で運ぶのが簡単な丈夫な取っ手があります。
C1 noun /ˈhɒməˌfoʊn/

homophone

同音異義語
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.
「pair」と「pear」の単語は同音異義語です。
B1 adjective /ˈhoʊpləs/

Hopeless

絶望的; 希望がない
Meaning
feeling or causing despair about something; without hope; desperate
Example
The situation seemed hopeless until help arrived.
助けが到着するまで、状況は絶望的に見えた。
C1 noun /ˈɛər.luːm/

heirloom

遺産
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.
その指輪は祖母から受け継がれた家族の遺産です。
B1 adjective hɪˈstɔːrɪk

historic

歴史的
Meaning
Famous or significant in history, or potentially so.
Example
Victory Day is a historic moment for Bangladesh.
勝利の日はバングラデシュにとって歴史的な瞬間です。
C1 adjective /ˈhæb.ɪ.tə.bəl/

Habitable

居住可能
Meaning
suitable or good enough to live in
Example
The planet Mars may become habitable in the future.
火星は将来、居住可能になるかもしれません。
C2 noun /haɪˈdrɒl.ɪ.sɪs/

hydrolysis

加水分解
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.
加水分解は複雑な分子をより単純な形に分解します。
B2 noun /hoʊm ˈdɪstrɪkt/

home district

出身地区
Meaning
the district where a person was born or originally comes from
Example
He returned to his home district after many years abroad.
彼は長年の海外生活の後、出身地区に戻った。
C1 verb /həˈluːsɪneɪt/

hallucinate

幻覚を見る
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.
薬を飲んだ後、彼は奇妙な形をハルシネイトし始めた。
C1 noun /ˈhɜː.mɪt/

Hermit

宗教的な修行として孤独に生きる人;社会から退く人
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.
その老いたハーミットは文明から遠く離れた山の中の小さな小屋で一人で暮らしていた。
C1 adjective /ˌhaɪdroʊɪˈlɛktrɪk/

hydroelectric

水力発電
Meaning
Relating to or denoting the generation of electricity using flowing water.
Example
The country invested heavily in hydroelectric power plants.
その国は水力発電所に多額の投資をしました。
C1 verb /ˈhæɡəl/

haggle

値切る
Meaning
to argue about the price; to bargain persistently
Example
They haggled over the price for an hour.
彼らは価格のことで1時間も値引き交渉をした。
B2 noun /ˈhaɪəˌrɑːrki/

hierarchy

階層
Meaning
A system in which people or things are arranged in levels of importance or authority.
Example
The corporate hierarchy determines who makes the final decision.
企業の階層は、最終決定を誰が行うかを決定します。
B2 noun /ˈhɑːr.mə.ni/

harmony

調和
Meaning
A pleasing combination of different elements or a state of peaceful coexistence.
Example
A society thrives when there is harmony among its people.
社会は人々の間に調和があると繁栄します。
C1 verb /ˈhɔːrɪfaɪ/

horrify

恐れさせる
Meaning
to fill with horror; to shock or disgust greatly
Example
The violent scene horrified the audience.
暴力的な場面が観客を恐れさせた。
C2 noun /ˈhjuːməs/

humus

腐植土
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.
庭師は植物の成長を促進するために土にフムスを加えました。
B2 noun /ˌhɪp.əˈpɒt.ə.məs/

Hippopotamus

カバ
Meaning
a large, mostly herbivorous mammal that lives in and around water in Africa
Example
The hippopotamus spends most of its day in the water.
カバは一日のほとんどを水の中で過ごします。
C1 adjective /həˈred.ɪ.ter.i/

Hereditary

遺伝的; 先祖から受け継がれた
Meaning
passed down through family genes; inherited from ancestors
Example
The hereditary disease was passed down through generations.
遺伝性疾患は世代を超えて受け継がれました。
B2 noun /ˌhez.ɪˈteɪ.ʃən/

Hesitation

ためらい; 躊躇
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.
一瞬のためらいの後、彼女は会社からの挑戦的な仕事のオファーを受け入れることに決めました。
C1 verb /ˈhjuːmənaɪz/

humanize

人間化する
Meaning
To make something more humane, kind, or relatable.
Example
The teacher tried to humanize the lesson with personal stories.
教師は個人的な物語を使ってレッスンを人間化しようとしました。
C1 noun /ˈhɑː.mə.nɪm/

homonym

同義語
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.
'コウモリ'という言葉は、動物またはスポーツ用品を意味することができるため、同義語です。
B2 adverb /ˈaʊər.li/

Hourly

毎時間; 毎時間行われるまたは行う; 継続的に
Meaning
every hour; happening or done each hour; continuously
Example
The weather report is updated hourly.
天気予報は毎時間更新されます。
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.
A1 noun, verb /hɛd/

head

頭 / リーダー
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.
彼女は窓の外を見るために頭を回した。
C1 noun /ˈhæŋ.ər/

Hangar

ハンガー
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.
飛行機は激しい雷雨の間、安全にハンガーに保管されていました。
B2 noun /ˈhænd.fʊl/

Handful

ひとつかみ; 小さな数量や数; コントロールが難しいもの
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.
彼女は歩きに出かける前に、ボウルからひとつかみのナッツをつかみました。
B1 adjective /ˈhɑːrmfəl/

Harmful

有害な
Meaning
causing or likely to cause harm; damaging
Example
Smoking is harmful to your health.
喫煙は健康に有害です。
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.
C2 noun /ˈhɛfər/

heifer

雌牛
Meaning
a young cow that has not borne a calf
Example
The farmer raised a heifer for dairy production.
農家は乳製品の生産のためにヘイファーを育てました。
C2 noun /ˈhɛklər/

heckler

野次を飛ばす人
Meaning
A person who interrupts a speaker with rude or aggressive comments.
Example
The politician remained calm despite the heckler shouting from the crowd.
政治家は群衆から叫んでいたヘクラーにもかかわらず冷静を保ちました。
A2 adverb /ˈhɑːd.li/

Hardly

ほとんどない; ほぼない; ほとんど信じられない
Meaning
scarcely; barely; almost not at all
Example
I could hardly believe what I was seeing.
私は見たものをほとんど信じることができませんでした。
B1 noun hoʊm əˈplaɪ.ənsɪz

home appliances

家電製品
Meaning
Electrical devices and machines used in households for daily tasks and convenience.
Example
Modern home appliances enhance convenience.
最新の家電製品は便利さを高めます。
A1 interjection /həˈloʊ/

hello

ハロー
Meaning
a greeting or expression used when meeting someone or starting a conversation
Example
She answered the phone with a cheerful hello.
彼女は電話を取って、元気にハローと言った。
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.
B2 noun /heə(r)/

Hare

野ウサギ
Meaning
a fast-running long-eared mammal that resembles a large rabbit
Example
The hare quickly ran across the field.
その野ウサギはフィールドを素早く走りました。
C1 noun /ˈhaɪndsaɪt/

hindsight

後知恵
Meaning
Understanding of a situation only after it has happened.
Example
With the benefit of hindsight, we realized the decision was a mistake.
後知恵で、私たちはその決断が間違いだったことに気づきました。
C1 noun /ˈheɪvən/

haven

避難所
Meaning
a safe place or shelter
Example
The library became a haven for students during exams.
試験中、図書館は学生たちの避難所となった。
B2 noun /hɜːb/ (US) /hɜːb/ or /ɜːb/

herb

ハーブ
Meaning
a plant used for flavoring food, medicine, or perfume
Example
Basil is a popular herb used in Italian cuisine.
バジルはイタリア料理で人気のあるハーブです。
A1 verb /ˈhæpən/

happen

起こる
Meaning
to occur or take place; to come about by chance
Example
What happened at the meeting yesterday?
昨日の会議で何が起こったのですか?
C1 verb /ˈhaɪbərˌneɪt/

hibernate

冬眠する
Meaning
To spend the winter in a dormant state, as some animals do.
Example
Bears hibernate in caves during the winter.
クマは冬に洞窟で冬眠します。
C2 adjective /ˈhæriːd/

harried

過労や絶え間ない干渉で緊張したりストレスを感じたりする
Meaning
feeling strained or stressed due to being overworked or constantly bothered
Example
The harried teacher struggled to calm the noisy classroom.
過労の教師は騒々しい教室を静めるのに苦労していました。
C2 noun /ˈhʌmbʌɡ/

humbug

詐欺, くだらないこと
Meaning
Deceptive or false talk or behavior; nonsense.
Example
He dismissed the idea as humbug.
彼はその考えをくだらないことだとして退けた。
A2 verb /hʌnt/

hunt

狩り
Meaning
to chase and kill wild animals; to search for something
Example
The tigers hunt their prey at night.
トラは夜に獲物を狩ります。
C1 noun /ˈhaɪ.nəs/

Highness

高貴さ; 王室のタイトル
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.
殿下、王室の車は今晩の国宴にあなたをお連れする準備ができています。
C2 verb /həˈmɑː.dʒə.naɪz/

homogenize

均質化
Meaning
To make uniform or similar by blending or mixing different elements.
Example
The company tried to homogenize its products across global markets.
その会社は世界市場で製品を均質化しようとしました。
A1 verb /hoʊld/

hold

持つ
Meaning
to grasp or carry something; to maintain a position
Example
Please hold my hand.
私の手を取ってください。
C1 adjective /ˈhɑːrtˌrɛndɪŋ/

heartrending

胸が張り裂けるような
Meaning
Causing great sadness or distress; very moving emotionally.
Example
The documentary showed heartrending scenes of war victims.
ドキュメンタリーは戦争の犠牲者たちの胸が張り裂けるような場面を見せました。
C2 noun ˌhiː.məˈfɪl.i.ə

hemophilia

血友病
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.
血友病の治療は遺伝子編集から利益を得る。
B2 noun /ˌhɑː.spɪˈtæl.ə.ti/

Hospitality

ホスピタリティ
Meaning
the friendly and generous reception and entertainment of guests or strangers
Example
The hotel staff's exceptional hospitality made our vacation truly memorable and enjoyable.
ホテルスタッフの素晴らしいホスピタリティが私たちの休暇を本当に思い出深く、楽しいものにしました。
C1 verb /hjuːˈmɪlieɪt/

humiliate

侮辱する
Meaning
to make someone feel ashamed or foolish by injuring their dignity
Example
He was humiliated by his public failure.
彼は公の失敗で侮辱された。
C1 adjective /ˈhæk.nid/

hackneyed

使い古された
Meaning
Used too often and therefore lacking originality or freshness.
Example
The speech was filled with hackneyed phrases that failed to inspire the audience.
そのスピーチは使い古されたフレーズでいっぱいで、聴衆を鼓舞することはなかった。
B2 noun /er/

Heir

相続人
Meaning
a person legally entitled to the property or rank of another on that person's death
Example
The young prince was the rightful heir to the throne and would become king someday.
若い王子は王位の正当な相続人であり、いつか王になるでしょう。
A2 adjective /hjuːdʒ/

huge

巨大な
Meaning
extremely large in size or amount
Example
The stadium was filled with a huge crowd.
スタジアムは巨大な群衆で埋め尽くされていました。
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.
朝の霞は徐々に晴れ、太陽が空高く昇るにつれて明らかになった。
C2 adjective /ˌhɛtərəʊˈmɔːrfɪk/

heteromorphic

異形の
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.
蝶々はそのライフサイクルの中で異形であり、幼虫から成虫に変化します。
C2 adverb /hərˈmɛtɪkli/

hermetically

密封的に
Meaning
In a way that is completely airtight or sealed off.
Example
The jars were hermetically sealed to preserve freshness.
瓶は新鮮さを保つために密封的に封印されました。
C2 noun /ˈhæk.ni ˈkær.ɪdʒ/

Hackney carriage

ハックニーキャリッジ
Meaning
A taxi; a car licensed to carry passengers for hire
Example
I called a hackney carriage to get to the airport.
空港に行くためにハックニーキャリッジを呼びました。
A2 noun /hɑːrt/

Heart

心臓
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.
医者は聴診器で私の心臓を聞きました。
C1 verb /ˈhaɪdʒæk/

hijack

ハイジャック
Meaning
to take control of a vehicle or situation illegally or by force
Example
The criminals attempted to hijack the airplane.
犯罪者たちは飛行機をハイジャックしようとした。
C1 noun /ˈhaɪbrɪd/

hybrid

ハイブリッド
Meaning
a mixture of two different things, often combining the best qualities of both
Example
The car is a hybrid that runs on both electricity and fuel.
その車は電気と燃料の両方で走るハイブリッド車です。
C2 noun /ˈhɛptɑːrki/

heptarchy

七王国連邦
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.
歴史書はアングロサクソンのイングランドのヘプターキーを説明していました。
A2 verb /hɜːrt/

hurt

傷つける
Meaning
to cause pain or injury; to feel pain physically or emotionally
Example
My back hurts from sitting too long.
長時間座っていたので、背中が痛いです。
C1 noun /ˈhɔːl.mɑːrk/

hallmark

象徴的な特徴
Meaning
a typical characteristic or feature of someone or something
Example
Honesty is the hallmark of a good leader.
誠実さは良いリーダーの象徴的な特徴です。
C1 noun ˈhɛroʊˌɪzəm

heroism

英雄主義
Meaning
Great bravery; the qualities or attributes of a hero.
Example
The heroism of freedom fighters inspires the nation.
自由の戦士たちの英雄主義は国を鼓舞します。
C2 noun /ˌhɛtərəʤəˈniːɪti/

heterogeneity

異質性
Meaning
the quality or state of being diverse in character or content
Example
The cultural heterogeneity of the city makes it vibrant and unique.
その都市の文化的異質性は、それを活気に満ちたユニークなものにしています。
A1 noun /ˈhɒlɪdeɪ/

holiday

休暇
Meaning
A day of celebration or rest when most people do not work.
Example
We are planning a trip during the summer holiday.
私たちは夏休みの間に旅行を計画しています。
A2 noun /ˈheəkʌt/

haircut

散髪
Meaning
the act or style of cutting hair
Example
I got a haircut before the wedding.
私は結婚式の前に散髪しました。
C1 noun /ˈhɪntərlænd/

hinterland

内陸地域
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.
農民たちは地方の内陸地域から来て、都市で自分たちの農産物を販売しました。
A1 pronoun /hɜːr/

her

彼女
Meaning
used to refer to a female person or animal already mentioned or easily identified
Example
I saw her at the park yesterday.
昨日公園で彼女を見ました。
C1 adverb /ˈhʌŋ.ɡrə.li/

Hungrily

空腹で; 欲張って; 熱心に
Meaning
in a way that shows hunger; greedily; eagerly
Example
The dog ate hungrily after not eating for hours.
犬は数時間食べていなかった後、空腹で食べました。
C1 adjective /ˈhɛlθfəl/

healthful

健康的な
Meaning
Promoting good health; beneficial to health.
Example
A healthful diet includes fresh fruits and vegetables.
健康的な食事には新鮮な果物と野菜が含まれています。
C2 noun /ˈheɪ.deɪ/

Hey day

絶頂期; 黄金時代; ピーク時
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.
歌手としての絶頂期に、彼女は世界中で完売したコンサートに出演していました。
B1 verb/noun /haɪk/

hike

Meaning
To take a long walk in the countryside or mountains; also to increase suddenly (prices, rates, etc.).
Example
We decided to hike in the hills this weekend.
A1 pronoun /hiː/

he

彼 (男性)
Meaning
used to refer to a male person or animal already mentioned or easily identified
Example
He is my best friend.
彼は私の親友です。
B1 adjective /ˈhoʊpfəl/

Hopeful

希望に満ちた
Meaning
feeling or inspiring optimism about a future event; confident; optimistic
Example
He remained hopeful despite the challenges.
彼は挑戦にもかかわらず希望を持ち続けました。
B2 adjective /ˈhændi/

handy

使いやすい
Meaning
convenient to use or easily accessible; skillful with the hands
Example
This pocket knife is very handy when you go camping.
このポケットナイフはキャンプの時に非常に便利です。
A1 noun, adjective /hæf/

half

半分
Meaning
one of two equal parts of something
Example
He ate half of the cake.
彼はケーキの半分を食べました。
A2 noun /ˈherˌdrɛsər/

hairdresser

美容師
Meaning
a person whose job is to cut, style, and treat hair
Example
The hairdresser gave me a stylish haircut before the wedding.
美容師は結婚式の前に私におしゃれな髪型をしてくれました。
A2 interjection /hʌ/

huh

なんて言ったの?
Meaning
used to express confusion, surprise, or that you did not hear something
Example
Huh? What did you say?
は?なんて言ったの?
A2 verb /haɪd/

hide

隠す
Meaning
to put or keep out of sight; to conceal from view
Example
Children like to hide during games.
子供たちはゲームのときに隠れるのが好きです。
C1 adjective /ˌhæpi ɡoʊ ˈlʌki/

happy-go-lucky

おおらかで、気楽な、無頓着な
Meaning
cheerfully unconcerned about the future; carefree
Example
She has a happy-go-lucky attitude and never worries about tomorrow.
彼女はハピゴーラッキーな態度を持っており、明日のことを心配することはありません。
C1 noun /haʊnd/

Hound

猟犬
Meaning
a dog bred for hunting, typically having a keen sense of smell
Example
The bloodhound tracked the scent through the dense forest.
ブルッドハウンドは密な森の中で匂いを追跡しました。
B1 noun /ˈhev.ən/

Heaven

天国
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.
多くの人は、善い魂はこの世界を去った後に天国へ行くと信じている。
C1 verb /hɜːrl/

hurl

Meaning
To throw something with great force.
Example
The boy hurled a stone into the river.
C2 noun /ˈhɔːtɪnəs/

haughtiness

傲慢
Meaning
The appearance or quality of being arrogantly superior and disdainful.
Example
His haughtiness made him unpopular among his peers.
彼の傲慢さは彼を同僚の中で不人気にしました。
C2 noun /hæɡ/

Hag

魔女
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.
おとぎ話では、邪悪な魔女が森の奥深くの小屋に一人で住んでいた。
C1 noun /ˈhɛzɪtəns/

hesitance

ためらい
Meaning
The quality or state of being reluctant or uncertain.
Example
Her hesitance to speak up delayed the decision.
彼女のためらいは決定を遅らせました。
C2 adjective /hɛkˈsæŋɡjələr/

hexangular

六角形の
Meaning
Having six angles or corners.
Example
The artist designed a hexangular frame for the mirror.
アーティストは鏡のために六角形のフレームをデザインしました。
C1 adjective /ˈheɪ.nəs/

Heinous

凶悪
Meaning
extremely wicked or evil; abominable; morally reprehensible
Example
The heinous crime shocked the entire community.
その凶悪な犯罪はコミュニティ全体を衝撃を与えた。
B1 verb /ˈhaɪˌlaɪt/

highlight

強調する
Meaning
to emphasize or make something stand out
Example
The teacher highlighted the most important points in the text.
先生はテキストで最も重要な点をハイライトしました。
C2 noun /ˈhɔːrs.liːt͡ʃ/

Horse-leach

馬のヒル
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.
獣医は、馬のヒルがかつて馬の治療に広く使われていたと説明しました。
C1 adjective /hjuːˈmeɪn/

humane

人道的な
Meaning
Showing compassion or benevolence.
Example
The doctor provided humane treatment to the injured animals.
医者は怪我をした動物に人道的な治療を提供しました。
C2 adjective/noun /haɪˈbɜːrniən/

hibernian

アイリッシュ
Meaning
Relating to Ireland or the Irish.
Example
He enjoyed reading about Hibernian culture and history.
彼はハイバーニアン文化と歴史について読むのが好きでした。
C2 verb /ˈhʊdwɪŋk/

hoodwink

だます
Meaning
To deceive or trick someone.
Example
The scammer hoodwinked many people with false promises.
詐欺師は嘘の約束で多くの人々をだました。
B2 adjective /ˈhelp.ləs/

Helpless

無力; 助けがない; 脆弱
Meaning
unable to defend oneself or act without help; powerless; vulnerable
Example
The child felt helpless when lost in the crowded market.
その子供は混雑した市場で迷子になったとき、無力だと感じた。
C2 adjective /ˌhaɪpərˈkrɪtɪkl/

hypercritical

過剰に批判的な
Meaning
Excessively or unreasonably critical.
Example
The teacher was often hypercritical of small mistakes.
教師は小さなミスに対して過剰に批判的でした。
C2 noun /ˈhɒdʒ.pɒdʒ/

hodgepodge

寄せ集め
Meaning
A confusing mixture of different things; a jumble.
Example
The essay was a hodgepodge of unrelated ideas.
そのエッセイは関係のないアイデアの寄せ集めだった。
B2 noun /ˈhedʒhɒɡ/

Hedge-hog

ハリネズミ
Meaning
a small mammal with a spiny coat that can roll into a ball for defense
Example
The hedgehog rolled into a ball when it felt threatened.
ハリネズミは脅威を感じるとボールのように丸くなります。
A1 verb /hɪər/

hear

聞く
Meaning
to perceive sound; to listen to
Example
I can hear the birds singing.
私は鳥が歌っているのを聞くことができます。
B2 noun, adjective /hjuːˌmænɪˈtɛəriən/

humanitarian

人道主義者
Meaning
A person who seeks to promote human welfare, or something relating to human welfare and compassion.
Example
The organization provides humanitarian aid to disaster victims.
その組織は災害の被害者に人道的支援を提供します。
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.
鷹は獲物を探して畑の上を高く飛んだ。
C1 noun /ˈhaɪ.drəʊˌpaʊər ˌdʒen.əˈreɪ.ʃən/

hydropower generation

水力発電
Meaning
The production of electrical power through the use of the gravitational force of falling or flowing water.
Example
Hydropower generation promotes green energy.
水力発電はグリーンエネルギーを促進します。
C1 noun ˌhaɪ.pɚˈten.ʃən

hypertension

高血圧
Meaning
Abnormally high blood pressure.
Example
High sodium intake leads to hypertension.
高ナトリウム摂取は高血圧を引き起こします。
C1 adjective ˌhaɪ.pəˈθet.ɪ.kəl

hypothetical

仮定的, 想定的, 理論的
Meaning
Based on or serving as a hypothesis; supposed but not necessarily real or true.
Example
The discussion was based on hypothetical scenarios.
議論は仮定的なシナリオに基づいていました。
C2 noun /ˈhɛdʒɪrə/ or /hɪˈdʒaɪrə/

hegira

移住, 亡命
Meaning
a journey, especially when undertaken to escape from a dangerous or undesirable situation
Example
The refugees began their hegira across the desert.
難民たちは砂漠を越えて移住を始めた。
C1 noun /ˈhæm.lət/

Hamlet

小さな村
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.
谷間にある小さな村には、家が12軒と小さな教会が1つだけあった。
A2 noun /hɛn/

Hen

雌鶏
Meaning
female chicken
Example
The hen laid fresh eggs in the nest.
雌鶏は巣に新鮮な卵を産んだ。
B2 noun /həˈræsmənt/

harassment

嫌がらせ
Meaning
aggressive pressure or intimidation; unwanted and repeated behavior causing discomfort
Example
The company has a strict policy against workplace harassment.
その会社には職場でのハラスメントに対する厳しいポリシーがあります。
C2 noun /ˈhelmz.mən/

Helmsman

舵手; キャプテン
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.
経験豊富な舵手は、嵐の中で狭い水路をヨットで巧みに導きました。
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.
C1 adjective /həˈmɑː.dʒə.nəs/

homogenous

同質の
Meaning
Similar or uniform in nature; often used interchangeably with 'homogeneous'.
Example
The class was made up of a homogenous group of students.
クラスは同質の学生グループで構成されていました。
B2 noun ˈhæb.ɪt fɔːrˌmeɪ.ʃən

habit formation

習慣形成
Meaning
The process of creating a habit through regular practice and repetition.
Example
Habit formation requires consistency and discipline.
習慣形成には一貫性と規律が必要です。
C1 adjective /ˈhɪd.i.əs/

Hideous

ひどい; 醜い; 恐ろしい
Meaning
extremely ugly or unpleasant; causing shock or disgust
Example
The monster in the movie had a hideous appearance.
映画のモンスターはひどい外見をしていました。
C1 adjective /ˈhæpləs/

hapless

不運な, 不幸な
Meaning
unfortunate, unlucky, deserving pity
Example
The hapless traveler lost his passport on the very first day.
不運な旅行者は、初日にパスポートを失くしました。
C2 noun /ˌhaɪdroʊməˈkænɪks/

hydromechanics

ハイドロメカニクス
Meaning
The study of the mechanical properties and behavior of fluids in motion and at rest.
Example
Hydromechanics provides the foundation for naval architecture.
ハイドロメカニクスは船舶建造の基盤を提供します。
C1 noun /ˌhoʊmiˈɑːpəθi/

homeopathy

ホメオパシー
Meaning
a system of alternative medicine based on treating diseases with highly diluted substances
Example
He believes in homeopathy for treating common colds.
彼は風邪を治すためにホメオパシーを信じています。
A1 pronoun /hɪm/

him

彼を
Meaning
Used to refer to a male person or animal already mentioned.
Example
I saw him at the park yesterday.
昨日公園で彼を見かけました。
C2 noun /hoʊ/

Hoe

クワ
Meaning
a gardening tool with a thin metal blade used for breaking up soil and removing weeds
Example
The farmer used a hoe to remove weeds from his vegetable garden.
農夫は野菜畑から雑草を取り除くためにクワを使いました。
C2 adjective /həˈrɛtɪkəl/

heretical

異端的な
Meaning
Relating to or characterized by departure from accepted beliefs or standards, especially in religion.
Example
The priest condemned the book as heretical.
神父はその本を異端的だとして非難した。
B2 noun /ˈhæb.ɪ.tæt/

habitat

生息地
Meaning
The natural environment where an organism lives and meets its needs.
Example
The polar bear's natural habitat is the Arctic region.
ホッキョクグマの自然な生息地は北極地域です。