marble
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B2 noun /ˈmɑːrbəl/

marble

Meaning
a hard, smooth stone used in building and sculpture, often white with colored lines
Example
The floor of the palace was made of white marble.
B2 noun /ˌmedɪˈkeɪʃən/

medication

薬
Meaning
a drug or other form of medicine used to treat or prevent disease
Example
The doctor prescribed medication for his headache.
医者は彼の頭痛のために薬を処方した。
B2 noun /mɪˈθɒlədʒi/

mythology

Meaning
A collection of myths, especially belonging to a particular culture or religion.
Example
Greek mythology is filled with stories of gods and heroes.
B2 verb /maʊnt/

mount

取り付ける
Meaning
to climb up, rise, or fix something in place
Example
They plan to mount a camera on the wall.
彼らは壁にカメラを取り付ける予定です。
B2 noun /ˈmet.roʊ reɪl/

Metro Rail

メトロ
Meaning
an underground urban railway system; subway system
Example
The metro rail connects all major areas of the city efficiently.
メトロレールは都市のすべての主要地域を効率的に結びつけます。
B2 noun /ˈmʊzlɪm/

muslim

ムスリム
Meaning
a follower of Islam
Example
He is a devout Muslim.
彼は熱心なムスリムです。
B2 noun /ˌmɪs.ʌn.dəˈstæn.dɪŋ/

Misunderstanding

誤解
Meaning
A failure to understand something correctly; a disagreement or confusion between people
Example
The argument was caused by a simple misunderstanding.
その議論は単純な誤解から生じた。
B2 noun /ˈmɛntɔːr/

mentor

メンター
Meaning
an experienced person who advises and guides someone less experienced
Example
She acted as a mentor for the new employees.
彼女は新しい社員のためにメンターとして活動しました。
B2 noun /ˈmeɪn.tən.əns/

maintenance

メンテナンス
Meaning
The process of keeping something in proper working condition; upkeep.
Example
Regular maintenance increases the lifespan of machines.
定期的なメンテナンスは機械の寿命を延ばします。
B2 verb /ˈmæk.sɪ.maɪz/

maximize

最大化する
Meaning
to increase something as much as possible
Example
The company aims to maximize its profits this year.
会社は今年、利益を最大化することを目指しています。
B2 verb /mɜːrdʒ/

merge

統合する
Meaning
to combine or join together; to blend into one
Example
The two companies decided to merge to increase their market share.
2つの会社は市場シェアを増やすために合併することを決定しました。
B2 noun /ˈmæstərpiːs/

Masterpiece

傑作
Meaning
A work of outstanding artistry, skill, or workmanship
Example
The Mona Lisa is considered one of the greatest masterpieces of all time.
モナリザは、すべての時代で最も偉大な傑作の1つと見なされています。
B2 adjective /məˈtjʊr/

mature

成熟した
Meaning
fully developed or grown, especially emotionally or intellectually
Example
She has become a mature and confident leader.
彼女は成熟した自信に満ちたリーダーになった。
B2 noun /ˈmʌð.ər.hʊd/

Motherhood

母性
Meaning
the state of being a mother; the qualities of a mother
Example
She embraced the joys and challenges of motherhood.
彼女は母性の喜びと挑戦を受け入れました。
B2 adjective /mjuːt/

Mute

無言の; 話せない; 音がない
Meaning
silent; unable to speak; without sound
Example
He remained mute during the entire meeting.
彼は会議中ずっと無言だった。
B2 noun /maɪˈnɔːr.ɪ.ti/

minority

少数派
Meaning
A smaller number or part, especially a group differing from the majority.
Example
The law aims to protect the rights of ethnic minorities.
この法律は、民族的少数派の権利を保護することを目的としています。
B2 noun /ˈmæm.əl/

mammal

哺乳類
Meaning
A warm-blooded animal with hair or fur, and females produce milk for their young.
Example
The whale is the largest mammal on Earth.
クジラは地球上で最も大きな哺乳類です。
B2 adjective /ˈmɪnɪməl/

minimal

最小限
Meaning
the smallest or least amount possible
Example
The damage to the car was minimal after the accident.
事故後、車の損傷は最小限でした。
B2 noun /ˈməʊtərɪst/

motorist

自動車運転者
Meaning
a person who drives a motor vehicle, especially a car or motorcycle
Example
The motorist stopped to help after seeing the accident on the highway.
自動車運転者は事故を見て車を止め、助けました。
B2 adjective /ˈmænɪdʒəbəl/

Manageable

管理可能な; コントロールできる
Meaning
able to be controlled or dealt with; feasible
Example
The workload is manageable if we plan properly.
作業負荷は計画通りにすれば管理可能です。
B2 noun /məʊˈbɪləti/

mobility

モビリティ
Meaning
The ability to move or be moved freely and easily; the quality of being mobile.
Example
The mobility of workers is essential for the success of the project.
労働者のモビリティはプロジェクトの成功にとって不可欠です。
B2 noun /meɪz/

Maize

トウモロコシ
Meaning
a tall cereal plant bearing large grains on a cob; corn
Example
Farmers in the region grow maize as their primary crop for both food and animal feed.
この地域の農家は、食料と動物の餌の両方としてトウモロコシを主要な作物として育てています。
B2 noun ˈmoʊ.baɪl sɪˈkjʊr.ə.ti

mobile security

モバイルセキュリティ
Meaning
Protection of mobile devices and the data stored on them from security threats.
Example
Strong mobile security protects personal information.
強力なモバイルセキュリティは個人情報を保護します。
B2 noun /məˈstɑːʃ/

Moustache

ヒゲ
Meaning
hair that grows on the upper lip of men
Example
He grew a thick moustache for the play.
彼は劇のために濃いヒゲを生やした。
B2 noun /ˈmɪnərəl/

mineral

鉱物
Meaning
a naturally occurring substance that is solid and inorganic, often used in industry or nutrition
Example
Calcium is an important mineral for strong bones.
カルシウムは強い骨のための重要な鉱物です。
B2 noun /ˈmɛtəfɔːr/

metaphor

幸せ
Meaning
A figure of speech in which a word or phrase is applied to something to which it is not literally applicable.
Example
Time is a thief is a common metaphor for how quickly life passes.
彼女は賞を受け取ったとき、自分の幸せを隠せなかった。
B2 noun /məˌnɪp.jəˈleɪ.ʃən/

manipulation

操作
Meaning
The action of manipulating someone or something in a skillful manner; handling or controlling in a subtle, unfair, or unscrupulous way.
Example
Media manipulation influences public opinion.
メディア操作は公共の意見に影響を与えます。
B2 noun /ˈmɪs.tʃɪf/

Mischief

いたずら
Meaning
Playful behavior that causes minor trouble or annoyance but is not meant to cause serious harm
Example
The children were full of mischief during the summer holidays.
子供たちは夏休み中、いたずらでいっぱいでした。
B2 noun /ˈmɜːrdərər/

murderer

殺人犯
Meaning
a person who unlawfully kills another human being with intent
Example
The murderer was caught by the police within hours.
殺人犯は数時間以内に警察に捕まった。
B2 verb /mɒk/

mock

嘲笑する
Meaning
To make fun of someone or something in a cruel or unkind way.
Example
The students mocked his accent during class.
学生たちは授業中に彼のアクセントを嘲笑しました。
B2 noun /ˈmɛr.meɪd/

Mermaid

人魚
Meaning
A mythical sea creature with the head and torso of a woman and the tail of a fish
Example
The little girl loved stories about mermaids living under the sea.
小さな女の子は海の下に住む人魚の話が好きでした。
B2 adjective /ˈmɪl.ki waɪt/

Milky white

ミルクのような白
Meaning
a pure white color resembling milk
Example
The clouds looked milky white against the blue sky.
青い空を背景に雲がミルキーウェイトに見えた。
B2 adjective /ˈmɪd.əl.eɪdʒd/

Middle-aged

中年
Meaning
being of an age between young and old; typically between 40-60 years old
Example
The middle-aged man started a new career.
中年の男性が新しいキャリアを始めた。
B2 noun /ˌmænjəˈfæktʃərɪŋ/

manufacturing

製造業
Meaning
the process of making products on a large scale using machinery
Example
The country is investing heavily in the manufacturing sector.
その国は製造業に大規模に投資しています。
B2 noun /ˈmɔɪs.tʃər/

Moisture

湿気
Meaning
water or dampness that exists in small amounts in the air or on a surface
Example
The skin cream helps retain moisture.
スキンクリームは湿気を保持するのに役立ちます。
B2 adjective məˈriːn

marine

海の
Meaning
Of, relating to, or characteristic of the sea; living or growing in the sea.
Example
Marine ecosystems are highly sensitive to human activity.
海洋生態系は人間の活動に非常に敏感です。
B2 adverb /ˈmɪzərəbli/

Miserably

悲惨に
Meaning
in a wretched or unhappy manner; extremely badly
Example
The team performed miserably in the championship.
チームはチャンピオンシップで悲惨にプレーしました。
B2 adjective ˈmɒn.ɪ.tri

monetary

貨幣の
Meaning
Relating to money or currency.
Example
The monetary implications are significant for investors.
貨幣の影響は投資家にとって重要です。
B2 noun ˈmaɪnd.set

mindset

マインドセット
Meaning
The established set of attitudes held by someone.
Example
A growth mindset helps individuals embrace challenges.
成長マインドセットは、個人が挑戦を受け入れるのを助けます。
B2 verb /ˈmɑːdərət/

moderate

調整する
Meaning
to make less extreme or intense; to control or preside over
Example
She moderated the heated debate between the candidates.
彼女は候補者の間で熱い議論を調整しました。
B2 verb /maɪˈɡreɪt/

migrate

Meaning
To move from one region or habitat to another, especially regularly according to the seasons or for work.
Example
Birds migrate south during the winter.
B2 adjective /ˈmæn.dəˌtɔːr.i/

mandatory

義務的な
Meaning
required by law or rules; compulsory
Example
Wearing seat belts is mandatory in most countries.
ほとんどの国でシートベルトの着用は義務的です。
B2 noun /mʌŋk/

Monk

僧侶
Meaning
a man who is a member of a religious community living under vows
Example
The monk spent hours in meditation each day.
その僧侶は毎日数時間を瞑想に費やしました。
B2 noun ˈmɒnjʊmənt

monument

記念碑
Meaning
A statue, building, or other structure erected to commemorate a notable person or event.
Example
A monument should honor his contributions.
記念碑は彼の貢献を讃えるべきです。
B2 noun /mæt/

Mat

マット
Meaning
a piece of coarse material placed on a floor for people to wipe their feet on
Example
Please wipe your feet on the mat before entering.
入る前にマットで足を拭いてください。
B2 noun /məˈskiː.toʊ net/

Mosquito-net

蚊帳
Meaning
a fine mesh fabric used to cover beds or windows to keep mosquitoes and other insects out
Example
We use a mosquito net to protect ourselves from insect bites.
私たちは虫刺されを防ぐために蚊帳を使います。
B2 noun /ˈmɛmoʊ/

memo

Meaning
a written message, typically in a business setting
Example
He wrote a memo to the staff about the upcoming meeting.
B2 adverb /ˈmen.tə.li/

Mentally

精神的に
Meaning
relating to the mind; in terms of mental processes
Example
She was mentally preparing herself for the exam.
彼女は試験のために精神的に準備していた。
B2 noun /mɪnt/

Mint

ミント; 金貨の鋳造所
Meaning
An aromatic plant used for flavoring; also a place where money is manufactured
Example
She added fresh mint leaves to the tea for a refreshing taste.
彼女はお茶に新鮮なミントの葉を加えて、さわやかな味を加えました。
B2 noun /ˈmɪd.deɪ/

Midday

正午
Meaning
The middle of the day; twelve o'clock in the daytime; noon
Example
The sun is brightest at midday when it's directly overhead.
太陽は正午に最も輝いており、真上にあります。
B2 adverb /ˈmɪərli/

merely

ただ
Meaning
Only; nothing more than.
Example
She was merely trying to help.
彼女はただ助けようとしていました。
B2 noun /məˈlɛəriə/

malaria

マラリア
Meaning
a serious infectious disease spread by mosquitoes, causing fever, chills, and sweating
Example
Malaria is a common disease in tropical regions.
マラリアは熱帯地域で一般的な病気です。
B2 noun /ˈmɜːrsi/

Mercy

慈悲
Meaning
Compassion or forgiveness shown toward someone whom it is in one's power to punish
Example
The judge showed mercy and gave him a lighter sentence.
裁判官は慈悲を示し、より軽い判決を与えました。
B2 noun /məˈkænɪks/

mechanics

力学
Meaning
the branch of physics concerned with the motion of objects and the forces acting on them; also refers to the practical details of how something works
Example
He studied the mechanics of the machine before fixing it.
彼は機械を修理する前に、その力学を学んだ。
B2 noun /meɪz/

Maze

迷路
Meaning
A network of paths designed as a puzzle; a confusing situation
Example
The children got lost in the corn maze at the harvest festival.
子供たちは収穫祭のとうもろこしの迷路で迷子になった。
B2 noun ˈmaɪl.stəʊn

milestone

マイルストーン
Meaning
An important event or stage in the development, progress, or history of something.
Example
This discovery is a milestone in biotechnology.
この発見はバイオテクノロジーにおける重要なマイルストーンです。
B2 adjective /ˈmɪθɪkəl/

Mythical

神話的な
Meaning
existing only in myths or legends; imaginary or fictitious
Example
Dragons are mythical creatures that appear in many cultures.
ドラゴンは多くの文化に登場する神話的な生き物です。
B2 noun /moʊˈmɛn.təm/

momentum

勢い
Meaning
The quantity of motion of a moving body; the impetus and driving force gained by the development of a process or course of events.
Example
The company gained momentum after launching a new product.
会社は新しい製品を発売した後、勢いを得ました。
B2 adjective /mɑːrkt/

Marked

顕著な; 明確な; 独特な
Meaning
clearly noticeable; distinct; obvious
Example
There was a marked improvement in her performance.
彼女のパフォーマンスには顕著な改善がありました。
B2 adjective /ˈmɒdɪst/

modest

Meaning
Having or showing a humble estimate of one’s importance; simple and not extravagant.
Example
She lives in a modest house in the countryside.
B2 noun /ˈmɒtəʊ/

motto

モットー
Meaning
A short sentence or phrase that expresses a guiding belief or principle.
Example
Her motto in life is 'never give up.'
彼女の人生のモットーは「決して諦めないこと」です。
B2 adjective /ˌmɛtrəˈpɑːlɪtən/

metropolitan

大都市
Meaning
Relating to a large city, its surrounding areas, or its lifestyle.
Example
She moved to a metropolitan area for better job opportunities.
彼女はより良い仕事の機会のために大都市エリアに引っ越しました。
B2 noun/adjective /ˈmɪnətʃər/ or /ˈmɪniətʃʊr/

miniature

ミニチュア版
Meaning
a very small version of something; small in scale or size
Example
The artist created a miniature model of the castle.
アーティストは城のミニチュアモデルを作りました。
B2 noun /ˈmæt.rəs/

Mattress

マットレス
Meaning
a large rectangular pad for supporting the reclining body, used as or on a bed
Example
We bought a new mattress for our bedroom.
私たちは寝室のために新しいマットレスを買いました。
B2 noun /məˈʃiː.nər.i/

machinery

Meaning
machines collectively, or the parts of a machine; also, the system or process by which something works
Example
The factory invested in new machinery to increase production.
B2 adjective /ˈmɪnɪməm/

minimum

最小
Meaning
The least or smallest amount or quantity possible, attained, or required.
Example
This year saw a minimum unemployment rate.
今年の失業率は最小値に達しました。
B2 noun /ˌmɪsˈfɔːrtʃən/

misfortune

不運
Meaning
Bad luck or an unfortunate event.
Example
He suffered the misfortune of losing his job during the recession.
彼は不況時に仕事を失うという不運に見舞われました。
B2 noun ˈmɑːr.kɪt ɪˈkɒn.ə.mi

market economy

市場経済
Meaning
An economic system where production and pricing decisions are controlled by individuals and based on supply and demand.
Example
A market economy allows businesses to compete freely.
市場経済は企業が自由に競争できるようにします。
B2 noun /məˈræl.ə.ti/

Morality

道徳
Meaning
principles concerning the distinction between right and wrong behavior
Example
The debate focused on the morality of the decision.
議論はその決定の道徳性に焦点を当てました。
B2 noun /moʊd/

Mode

モード; 方法
Meaning
a way or manner in which something occurs or is done; a setting
Example
The computer has a sleep mode to save energy.
コンピュータにはエネルギーを節約するためのスリープモードがあります。
B2 noun ˈme.trɪks

metrics

メトリクス
Meaning
A system or standard of measurement; a set of numbers that give information about a particular process or activity.
Example
Metrics are crucial for evaluating performance.
メトリクスはパフォーマンスを評価するために重要です。
B2 verb /mɛnd/

mend

修理する
Meaning
To repair something that is broken or damaged.
Example
She learned to mend her torn dress.
彼女は裂けたドレスを修理することを学びました。
B2 noun /ˌmɒd.ən.aɪˈzeɪ.ʃən/

modernization

近代化
Meaning
The process of adapting something to modern needs or habits.
Example
Modernization of industries reduces pollution.
産業の近代化は汚染を減らします。
B2 adjective /ˌmʌl.tiˈpɜː.pəs/

Multipurpose

多目的
Meaning
having multiple uses or functions; versatile
Example
This multipurpose tool can be used as a knife, screwdriver, and bottle opener.
この多目的ツールは、ナイフ、ドライバー、ボトルオープナーとして使用できます。
B2 noun /maɪˈɡreɪʃən/

migration

移動
Meaning
the movement of people or animals from one place to another, often for better living conditions or seasonal reasons
Example
The annual migration of birds is a fascinating natural event.
鳥の毎年の移動は魅力的な自然現象です。
B2 verb /ˌmɪsˈjuːz/

misuse

誤用
Meaning
To use something incorrectly or for the wrong purpose.
Example
Misusing social media profiles can harm relationships.
ソーシャルメディアのプロフィールを誤って使うと、人間関係に害を及ぼす可能性があります。
B2 noun məˈtæb.əl.ɪ.zəm

metabolism

新陳代謝
Meaning
The chemical processes that occur within a living organism in order to maintain life.
Example
Exercise boosts metabolism and burns calories.
運動は新陳代謝を促進し、カロリーを燃焼します。
B2 noun /ˈmænʃən/

mansion

幸せ
Meaning
a large, impressive house
Example
The billionaire lives in a luxurious mansion overlooking the ocean.
彼女は賞を受け取ったとき、幸せを隠すことができませんでした。
B2 noun /ˌmɛθəˈdɑlədʒi/

methodology

方法論
Meaning
A system of methods used in a particular area of study or activity.
Example
The research was conducted using a new methodology.
その研究は新しいメソドロジーを使って行われました。
B2 noun /ˈmærəθən/

marathon

マラソン
Meaning
a long-distance running race, typically 42.195 kilometers (26.2 miles)
Example
She completed the marathon in under four hours.
彼女は4時間以内にマラソンを完走しました。
B2 noun /mɪθ/

myth

神話
Meaning
A traditional story explaining natural or social phenomena, often involving supernatural beings; a widely held but false belief.
Example
The myth of the phoenix tells of a bird reborn from its ashes.
フェニックスの神話は、灰の中から生まれ変わった鳥の話を伝えています。
B2 noun məˈmɔːriəl

memorial

記念碑
Meaning
A structure or building made to remind people of a person or event.
Example
Thousands gather at the National Memorial.
何千人もの人々が国立記念碑に集まります。
B2 noun ˈmɒn.ə.ki

monarchy

君主制
Meaning
A form of government with a monarch at the head, where supreme power is held by a single person such as a king or queen.
Example
The monarchy was abolished during the revolution.
革命の間に君主制は廃止されました。
B2 verb /mɔːrn/

mourn

哀悼する
Meaning
To feel or express deep sadness or grief, especially because of someone's death.
Example
They gathered to mourn the loss of their friend.
彼らは友人の死を悼むために集まりました。
B2 noun /ˌmɒdəˈreɪʃən/

moderation

Meaning
The avoidance of excess or extremes; keeping balance or within reasonable limits.
Example
He drinks wine in moderation.
B2 noun /ˈmɑːrdʒɪn/

Margin

余白; 範囲
Meaning
The edge or border of something; an amount allowed beyond what is needed
Example
Please write your notes in the margin of the page.
ページの余白にメモを書いてください。
B2 noun /məˈtʃʊrəti/

Maturity

成熟
Meaning
The state of being mature; full development physically or emotionally
Example
With age comes wisdom and emotional maturity.
年齢とともに知恵と感情的成熟が訪れる。
B2 verb /ˈmɒdənaɪz/

modernize

近代化する
Meaning
To adapt something to modern needs or styles; to update or improve.
Example
The company plans to modernize its IT infrastructure.
その会社はITインフラを近代化する計画です。
B2 adjective /ˈmiː.nɪŋ.ləs/

Meaningless

無意味; 目的がない; 意味がない
Meaning
without purpose; having no significance; pointless
Example
The data became meaningless without proper context.
データは適切なコンテキストがなければ意味がありません。
B2 adjective /mæɡˈnɪfɪsənt/

magnificent

素晴らしい
Meaning
extremely beautiful, impressive, or splendid
Example
The view from the mountain was truly magnificent.
山からの景色は本当に素晴らしかった。
B2 noun /ˈmɪn.ɪ.stri/

Ministry

省庁
Meaning
A government department responsible for a particular area of public administration
Example
The Ministry of Education announced new policies for schools.
教育省は学校のための新しい政策を発表しました。
B2 verb ম্যানিফেস্ট

manifest

現れる
Meaning
To show or demonstrate clearly; to become evident or apparent.
Example
Symptoms of De Quervain's Syndrome may manifest after prolonged phone use.
デ・クエルヴァイン症候群の症状は、長時間の携帯電話使用後に現れることがあります。
B2 adjective /ˈmɛtrɪk/

metric

メトリック
Meaning
Relating to the metric system of measurement; also, a standard of measurement used to assess performance.
Example
The company tracks success using clear performance metrics.
会社は明確なパフォーマンス指標を使用して成功を追跡しています。
B2 adverb /ˈmæn.ju.ə.li/

Manually

手動で; 物理的な労力を使って;
Meaning
by hand; using physical effort rather than machines
Example
The data was entered manually into the system.
データは手動でシステムに入力されました。
B2 verb ˈmɪnɪmaɪz

minimize

最小化する
Meaning
Reduce (something, especially something unwanted or unpleasant) to the smallest possible amount or degree.
Example
Efforts should be made to minimize plastic usage.
プラスチック使用を最小化するために努力が必要です。
B2 adjective /ˈmɛʒərd/

measured

測定された
Meaning
carefully considered and deliberate
Example
She spoke in a calm, measured tone.
彼女は冷静で測定された口調で話しました。
B2 adjective /ˈmæn.ju.əl/

Manual

手動
Meaning
done by hand; operated by hand; not automatic
Example
This is a manual process that requires careful attention.
これは手動プロセスで、慎重な注意が必要です。
B2 noun ˈmɒn.ɪ.tər.ɪŋ

monitoring

監視
Meaning
The action of observing and checking the progress or quality of something over a period of time.
Example
Monitoring ensures compliance with standards.
モニタリングは基準の遵守を確保します。
B2 adjective /ˈmjuːtʃuəl/

Mutual

相互
Meaning
shared by two or more parties; reciprocal
Example
They have a mutual respect for each other.
彼らはお互いに相互尊重を持っています。
B2 noun /ˈmæd.nəs/

Madness

狂気; 精神錯乱;
Meaning
the state of being mentally ill, especially severely; extremely foolish behavior
Example
It would be madness to drive in this storm.
この嵐の中で運転するのは狂気だろう。
B2 noun /ˈmɪz.ər.i/

Misery

苦しみ; 極度の貧困; 苦痛
Meaning
Great mental or physical suffering; extreme unhappiness or distress
Example
The poor family lived in complete misery after losing their home.
貧しい家族は家を失った後、完全な苦しみに生きていました。
B2 noun /ˈmes.ɪn.dʒər/

Messenger

使者
Meaning
a person who carries messages or communications between parties
Example
The messenger delivered important battle plans to the commander.
使者は司令官に重要な戦闘計画を届けました。
B2 noun /ˈmɒdjuːl/

module

モジュール
Meaning
a self-contained unit of a course or system, typically part of a larger whole
Example
The module on machine learning was difficult but informative.
機械学習のモジュールは難しかったが、情報が豊富だった。
B2 noun /mɪkst ˈkʌlər/

Mixed colour

混合色
Meaning
a color created by combining two or more different colors
Example
The mixed colour created a beautiful gradient on the canvas.
混合色はキャンバスに美しいグラデーションを作り出しました。
B2 noun /mɒsk/

mosque

モスク
Meaning
A Muslim place of worship.
Example
They gathered at the mosque for the Friday prayer.
彼らは金曜日の祈りのためにモスクに集まりました。
B2 adverb /ˈmiːn.taɪm/

Meantime

その間に
Meaning
during the time between two events; in the period of time between now and when something else happens
Example
The food will be ready in an hour; in the meantime, we can watch TV.
食べ物は1時間後に準備が整います。その間にテレビを見ていましょう。
B2 adverb /mɪdst/

Midst

真ん中で; その中で
Meaning
in the middle of; among
Example
She stood in the midst of the crowd.
彼女は群衆の真ん中に立っていました。
B2 noun /menˈtæləti/

Mentality

メンタリティ; 思考方法
Meaning
The characteristic attitude of mind or way of thinking of a person or group
Example
The team needs to develop a winning mentality to succeed.
チームは成功するために勝者のメンタリティを発展させる必要がある。
B2 noun /ˌmɪs.bɪˈheɪ.vjər/

Misbehaviour

悪いまたは受け入れられない行動、特に子供によるものや公式の場面で
Meaning
Bad or unacceptable behavior, especially by children or in formal situations
Example
The student was punished for his misbehaviour in class.
生徒はクラスでの不適切な行動で罰を受けた。
B2 noun /ˌmɛdɪˈteɪʃən/

meditation

瞑想
Meaning
The practice of focusing the mind to achieve calmness, clarity, or spiritual growth.
Example
She practices meditation every morning to start her day peacefully.
彼女は毎朝瞑想を実践して、穏やかな一日を始めます。
B2 adjective /mɪˈsteɪkən/

mistaken

間違った
Meaning
wrong or incorrect because of an error in judgment or understanding
Example
I was mistaken about the meeting time.
私は会議の時間を間違えていました。
B2 noun /mjuːl/

Mule

ラバ
Meaning
the offspring of a donkey and a horse, used as a working animal
Example
The farmer used a mule to carry heavy loads.
農夫は重い荷物を運ぶためにラバを使いました。
B2 noun /ˈmɛr.ɪt/

Merit

メリット; 優れた点; 評価に値する品質
Meaning
The quality of being particularly good or worthy, especially deserving praise, reward, or attention
Example
She was promoted based on her merit and hard work.
彼女はそのメリットと努力によって昇進しました。
B2 noun /ˈmɜːrtʃənt/

merchant

商人
Meaning
a person or company involved in the trade of goods, especially in large quantities
Example
The merchant sold spices from distant lands.
商人は遠くの土地から香辛料を売っていた。
B2 noun /ˈmæstəri/

Mastery

熟練; 精通;
Meaning
Great skill or expertise in a subject or activity
Example
His mastery of the violin impressed audiences around the world.
彼のヴァイオリンの腕前は世界中の観客を感動させました。
B2 noun /ˈmoʊ.tɪv/

Motive

動機; 理由; 刺激
Meaning
a reason for doing something; what drives someone to act
Example
The police are investigating the motive for the crime.
警察は犯罪の動機を調査しています。
B2 adjective /ˈmɪstʃɪvəs/

Mischievous

いたずらな; おてんばな; わんぱくな
Meaning
playfully naughty; causing minor trouble; impish
Example
The mischievous child hid his sister's favorite toy.
いたずらな子供が姉のお気に入りのおもちゃを隠した。
B2 adjective/noun /ˈmaɪ.nər/

minor

小さい / 未成年
Meaning
less important, serious, or significant; a person under the legal age
Example
Luckily, the accident caused only minor injuries.
幸運にも、事故は軽いけがだけを引き起こしました。
B2 noun /ˈmaɪnə(r)/

miner

鉱夫
Meaning
a person who works in a mine, extracting minerals or other resources
Example
The miner worked in the coal mine for many years.
鉱夫は長年、石炭鉱で働いていました。
B2 verb /ˌmɪsbɪˈheɪv/

misbehave

行儀が悪い
Meaning
to behave badly or inappropriately; to act in an unacceptable way
Example
The children misbehaved during the school assembly.
子供たちは学校の集会で行儀が悪かった。
B2 noun /ˈmeɪnstriːm/

mainstream

主流
Meaning
the ideas, attitudes, or activities that are regarded as normal or conventional; the dominant trend in opinion or fashion
Example
Social media has become a mainstream source of news for many people.
ソーシャルメディアは多くの人々にとって主流のニュースソースとなった。