militia
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C1 noun /mɪˈlɪʃə/

militia

民兵
Meaning
a group of ordinary people who are trained to act as soldiers in emergencies
Example
The village formed a militia to defend against attacks.
村は攻撃から守るために民兵を結成した。
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。
C1 noun ˈmæŋɡroʊv ˈfɒrɪst

Mangrove Forest

マングローブの森
Meaning
A coastal forest ecosystem characterized by salt-tolerant trees and shrubs that grow in intertidal zones.
Example
Sundarbans is the world's largest mangrove forest.
スンダルバンズは世界最大のマングローブの森です。
C2 adjective /ˌmækɪəˈvɛliən/

machiavellian

陰謀的で計略的、特に政治や自分のキャリアを進めるために倫理を無視する
Meaning
cunning, scheming, and unscrupulous, especially in politics or in advancing one's career
Example
The politician was known for his Machiavellian tactics.
その政治家はマキャヴェリアンな戦術で知られていた。
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。
C1 noun /ˈmiːnnəs/

Meanness

意地悪; ケチ
Meaning
The quality of being unkind, spiteful, or unfair; stinginess
Example
His meanness towards the poor children shocked everyone in the neighborhood.
貧しい子供たちに対する彼の意地悪は、近所の誰もが驚きました。
C2 noun /ˈmɪs.kri.ənt/

Miscreant

悪党; 犯罪者
Meaning
A person who behaves badly or illegally; a villain or criminal
Example
The miscreant was caught stealing from the store.
その悪党は店で物を盗んでいるところを捕まえられました。
C1 verb /mɑːrd/

marred

台無しにする
Meaning
to spoil or damage the quality or appearance of something
Example
The celebration was marred by bad weather.
お祝いは悪天候で台無しになりました。
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。
A2 noun /ˈmoʊtər/

motor

モーター
Meaning
a machine that produces motion or power to make something work
Example
The car’s motor stopped suddenly.
車のモーターは突然止まりました。
A2 adjective /mæd/

Mad

怒っている; 精神的に病んでいる; 狂っている
Meaning
angry; mentally ill; insane
Example
He was mad at his friend for being late.
彼は友達が遅れたことで怒っていた。
C1 noun/adjective /ˈmɪriəd/

myriad

無数
Meaning
a countless or extremely great number
Example
There are myriad stars in the night sky.
夜空には無数の星がある。
C2 adjective /ˈmeɪndʒi/

mangy

汚くて使い古された
Meaning
in poor condition, shabby, dirty, or affected by mange
Example
The stray dog looked mangy and weak.
迷子の犬は汚れて弱々しく見えた。
A2 noun ˈmuːv.mənt

movement

運動
Meaning
A group of people working together to advance their shared political, social, or artistic ideas.
Example
The movement aimed to ensure equal rights.
そのムーブメントは平等な権利を確保することを目指していました。
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。
A2 adjective /ˈmuːvɪŋ/

moving

感動的
Meaning
causing strong feelings, especially of sympathy or sadness
Example
Her speech was so moving that everyone cried.
彼女のスピーチはとても感動的で、みんな泣いてしまった。
C2 noun /mɪf/

miff

小さな争い
Meaning
A petty quarrel or annoyance.
Example
They had a slight miff over the seating arrangement.
彼らは座席配置について小さな争いを起こしました。
C2 verb /ˈmæk.ɪ.neɪt/

machinate

陰謀を企てる
Meaning
to engage in plots or schemes, usually for harmful or evil purposes
Example
The rebels tried to machinate against the king.
反乱者たちは王に対して陰謀を企てようとした。
B2 adjective /ˌmæθəˈmætɪkəl/

mathematical

数学的
Meaning
relating to mathematics or the use of mathematics
Example
The mathematical equation was difficult to solve.
その数学的な方程式は解くのが難しかった。
B1 noun ˈmeʒ.ərz

measures

措置
Meaning
A plan or course of action taken to achieve a particular purpose.
Example
Mitigation measures focus on reducing emissions.
緩和措置は排出量の削減に焦点を合わせています。
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。
C2 verb /ˈmɒlɪfaɪ/

mollify

なだめる
Meaning
To calm or soothe someone's anger or anxiety.
Example
The manager tried to mollify the angry customers with discounts.
マネージャーは割引で怒った顧客をなだめようとした。
C1 verb /ˈmæd.ən/

madden

怒らせる
Meaning
To make someone very angry or extremely annoyed.
Example
The constant noise maddened him.
絶え間ない音が彼を怒らせた。
C1 adjective /ˈmɒsi/

Mossy

苔むしている; 苔が生えている
Meaning
covered with moss; having moss growing on it
Example
The old tree trunk was mossy and covered with green vegetation.
古い木の幹は苔むしており、緑の植物で覆われていました。
A1 adjective /mʌm/

Mum

沈黙; 何も言わない; 静かにする
Meaning
silent; saying nothing; keeping quiet
Example
He kept mum about the surprise party plans.
彼はサプライズパーティーの計画について沈黙していました。
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。
C1 adjective /məˈroʊs/

morose

陰鬱
Meaning
sullen, gloomy, or ill-tempered
Example
He became morose after losing his job.
彼は仕事を失った後、落ち込んでしまった。
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.
A2 adjective /meɪn/

main

主要な
Meaning
most important; chief in size, extent, or importance
Example
The main reason for his success is hard work.
彼の成功の主な理由は、努力したことです。
C1 noun /ˈmɒnəˌθiːɪzəm/

monotheism

一神教
Meaning
The belief in the existence of only one God.
Example
Islam and Christianity are religions based on monotheism.
イスラム教とキリスト教は一神教に基づいている。
C2 noun ˌmæɡnəˈnɪmɪti

magnanimity

寛大さ
Meaning
Generosity in forgiving an insult or injury; forbearance.
Example
His magnanimity towards his competitors was admirable.
彼の競争相手への寛大さは賞賛に値した。
A2 noun /ˈmɒn.stər/

Monster

怪物; 残酷な人
Meaning
a large, ugly, and frightening imaginary creature; a cruel person
Example
The children were scared of the monster under the bed.
子供たちはベッドの下の怪物を怖がっていた。
C1 noun /ˈmaɪlɪdʒ/

mileage

燃費
Meaning
The distance traveled in miles, or the fuel efficiency of a vehicle.
Example
This car gives excellent mileage on highways.
この車は高速道路で優れた燃費を提供します。
C1 adjective /ˈmʌðərli/

Motherly

母性的
Meaning
having qualities characteristic of a mother; caring and protective
Example
She showed motherly care and affection towards all the children.
彼女はすべての子供たちに母親のようなケアと愛情を示しました。
B1 noun /ˈmɛθ.əd/

Method

方法
Meaning
A particular way of doing something, especially a systematic or established procedure
Example
She developed a new method for solving mathematical problems.
彼女は数学の問題を解決するための新しい方法を開発しました。
C1 noun /ˈmʌs.tərd siːdz/

Mustard seeds

マスタードシード
Meaning
small round seeds from the mustard plant, used as a spice and for making mustard condiment
Example
Mustard seeds are often tempered in hot oil to release their nutty flavor before adding to dishes.
マスタードシードは、料理に加える前に、そのナッツのような風味を引き出すために熱い油で炒められることがよくあります。
A2 adjective /maɪld/

mild

穏やか
Meaning
not severe or strong; gentle in nature
Example
The patient had only mild symptoms.
患者には軽い症状だけがありました。
A2 noun /ˈmæɡəziːn/

magazine

雑誌
Meaning
A periodical publication containing articles, photographs, and advertisements.
Example
She bought a fashion magazine at the store.
彼女は店でファッション雑誌を買いました。
B2 noun /ˈmɑːrkɪtˌpleɪs/

marketplace

市場
Meaning
a place where goods and services are bought and sold; an open area for trade
Example
The town's marketplace is crowded every Friday morning.
街の市場は毎週金曜日の朝に混雑しています。
B1 noun /ˌmɪl.jəˈneər/

Millionaire

ミリオネア
Meaning
A person whose wealth equals or exceeds one million units of currency
Example
He became a millionaire through smart investments and hard work.
彼は賢い投資と努力のおかげでミリオネアになった。
C1 adjective ˌmæk.roʊ.iː.kəˈnɒm.ɪk

macroeconomic

マクロ経済的
Meaning
Relating to the large-scale or general economic factors, such as interest rates and national productivity.
Example
Government policies impact macroeconomic stability.
政府の政策はマクロ経済的安定に影響を与える。
B2 noun /ˌmedɪˈkeɪʃən/

medication

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。
A2 noun /ˈmaʊn.tɪn/

Mountain

Meaning
a large natural elevation of earth and rock rising above the ground
Example
They climbed the highest mountain in the region.
彼らはその地域で最も高い山を登りました。
C1 noun /ˈmæroʊ/

Marrow

骨髄
Meaning
A soft fatty substance in the cavities of bones; the essence of something
Example
The bone marrow produces blood cells in the human body.
骨髄は人体で血液細胞を生成します。
C2 noun /məˈrɔː.dər/

marauder

略奪者
Meaning
a person who roams around in search of things to steal or people to attack
Example
Villagers feared the marauders who raided their homes.
村人たちは自分たちの家を襲った略奪者を恐れていた。
C2 verb /ˈmʌfəl/

muffle

抑える
Meaning
to make a sound quieter or less distinct; to cover or wrap something to reduce noise or warmth
Example
She tried to muffle her laughter with a scarf.
彼女はスカーフで笑い声を抑えようとした。
C1 noun /ˈmeɪhɛm/

mayhem

混乱
Meaning
Violent or extreme disorder; chaos and destruction.
Example
The protest turned into mayhem when the crowd clashed with the police.
抗議活動は群衆が警察と衝突したときに混乱に変わった。
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。
C2 adjective /ˈmjuːtɪnəs/

mutinous

反乱者
Meaning
refusing to obey authority; rebellious
Example
The soldiers grew mutinous after months without pay.
兵士たちは数ヶ月間給料がなくて反乱者になった。
B1 verb, noun, adjective /ˈmeltɪŋ/

melting

溶けること
Meaning
the process of changing from solid to liquid due to heat; becoming softer or less rigid; emotionally moving or tender
Example
The ice is melting quickly under the hot sun.
氷は強い日差しで早く溶けています。
C1 noun /ˈmenəs/

Menace

脅威
Meaning
A person or thing that is likely to cause harm; a threat
Example
The reckless driver was a menace to everyone on the road.
その無謀な運転手は道路のすべての人々にとって脅威だった。
A1 pronoun /maɪ/

my

私の
Meaning
used to indicate possession or ownership
Example
This is my book.
これは私の本です。
C1 noun /ˈmaɪkrəʊˌklaɪmæt/

microclimate

ミクロクライメート
Meaning
The climate of a small, specific area that may differ from the general climate of the surrounding region, often influenced by local factors like terrain, vegetation, or buildings.
Example
A microclimate can have a significant impact on plant growth.
マイクロクライメートは植物の成長に重要な影響を与える可能性があります。
C1 verb məˈtæb.ə.laɪz

metabolize

成長のために食物を処理して利用する
Meaning
Process and use food for growth and to replace tissue, or process other substances in the body.
Example
The liver helps to metabolize toxins.
肝臓は毒素をメタボライズするのを助けます。
A1 verb /miːt/

meet

会う
Meaning
to come into the presence of; to encounter
Example
I will meet you at the café.
カフェで会います。
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。
B1 noun /ˈmelədi/

Melody

メロディ; 音楽の旋律
Meaning
A sequence of single notes that is musically satisfying; a tune
Example
She hummed a beautiful melody while cooking dinner.
彼女は夕食を作りながら、美しいメロディを口ずさんでいました。
C2 noun /meɪˈlɑːnʒ/

melange

混合
Meaning
A mixture of different things or styles.
Example
The festival offered a melange of music, food, and art.
そのフェスティバルでは、音楽、食べ物、アートの混合が提供されました。
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。
C2 adjective /ˈmɒθ ˌiːtən/

moth-eaten

虫に食べられた
Meaning
Damaged or worn out, especially by moths or age.
Example
He wore a moth-eaten sweater on the cold day.
彼は寒い日に虫に食べられたセーターを着ていた。
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 /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。
C2 noun /ˈmæl.kənˌtɛnt/

malcontent

不満な人
Meaning
A person who is dissatisfied or rebellious; one who is not content.
Example
The malcontent voiced his grievances against the government.
不満な人は政府に対して不平を述べました。
C2 noun /ˈmɛtəl/

mettle

勇気
Meaning
A person's ability to cope well with difficulties or to face demanding situations with courage.
Example
The young athlete showed his mettle in the final match.
その若いアスリートは決勝戦で勇気を示しました。
C1 noun /ˈmiːknəs/

Meekness

謙遜
Meaning
The quality of being quiet, gentle, and submissive
Example
His meekness was often mistaken for weakness by his colleagues.
彼の謙遜はしばしば同僚に弱さだと誤解された。
B2 verb /ˌmænjʊˈfæktʃər/

manufacture

製造
Meaning
to produce goods in large quantities using machinery; to make or create something
Example
The company manufactures electronic devices for global markets.
その会社はグローバル市場向けに電子機器を製造しています。
C2 noun /ˈmæn.li.nəs/

manliness

男らしさ
Meaning
The quality of being manly; courage, strength, and honor associated with men.
Example
His manliness was admired by his peers.
彼の男らしさは仲間たちに賞賛された。
C1 noun /ˈmeɪniə/

Mania

マニア; 極端な熱狂
Meaning
Mental illness marked by periods of great excitement; extreme enthusiasm
Example
She had a mania for collecting vintage postcards from around the world.
彼女は世界中から古いポストカードを集めることに夢中でした。
C2 adjective /mɛnˈdeɪʃəs/

mendacious

虚偽の
Meaning
not telling the truth; lying
Example
The politician was known for his mendacious statements.
その政治家は嘘の発言で知られていました。
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。
C1 adjective /maɪˈkroʊ.bi.əl/

microbial

微生物の
Meaning
Related to bacteria, fungi, and other microscopic organisms.
Example
Microbial activity in the soil improves fertility.
土壌中の微生物活動は肥沃度を改善します。
C2 noun /ˌmæk.ɪˈneɪ.ʃən/

Machination

陰謀; 策略;
Meaning
a clever scheme or artful plot, usually with evil intent; crafty designing or plotting
Example
The villain's machinations were finally exposed.
悪役の陰謀は最終的に暴露された。
C2 noun /ˈmaɪkrəˌkɒzəm/

microcosm

ミクロコスム
Meaning
A small, representative system having analogies to a larger system; a miniature version of something.
Example
The small town is a microcosm of the entire nation.
その小さな町は、国全体のミクロコスムです。
B2 noun /ˈmaɪnd.fʊl.nəs/

mindfulness

マインドフルネス
Meaning
The basic human ability to be fully present, aware of where we are and what we're doing.
Example
Mindfulness practices improve focus and emotional balance.
マインドフルネスの実践は集中力と感情のバランスを改善します。
C1 noun /ˈmeɪsən/

mason

石工
Meaning
a person skilled in building with stone, brick, or concrete
Example
The mason carefully laid the bricks for the new house.
石工は新しい家のために慎重にレンガを積みました。
C1 adjective /mjuːˈnɪsɪpəl/

municipal

市営の
Meaning
relating to a city or town or its local government
Example
The municipal authority is responsible for maintaining the park.
市営当局は公園の維持管理を担当しています。
C2 noun /ˈmæl.əˌfæk.tər/

malefactor

悪党
Meaning
A person who commits a crime or does evil.
Example
The malefactor was arrested for the robbery.
その悪党は強盗で逮捕された。
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。
A1 noun /ˈmʌn.deɪ/

monday

月曜日
Meaning
the first day of the working week following Sunday
Example
I start my new job on Monday.
私は月曜日に新しい仕事を始めます。
C2 noun /ˌmæləˈdɪkʃən/

Malediction

呪い
Meaning
A magical word used to invoke a curse; an evil spell
Example
The witch uttered a terrible malediction upon her enemies.
魔女は敵に恐ろしい呪いをかけました。
C1 adjective /ˌmer.ɪˈtɔː.ri.əs/

Meritorious

称賛に値する
Meaning
deserving reward or praise; commendable; worthy of recognition
Example
His meritorious service to the community was recognized.
彼の社会への価値ある貢献は認められました。
C1 noun /ˌmælnuːˈtrɪʃən/

Malnutrition

栄養失調; 不適切な栄養
Meaning
Lack of proper nutrition; poor nourishment
Example
Malnutrition among children is a serious public health concern.
子供たちの間で栄養失調は深刻な公衆衛生の問題です。
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。
C1 verb /ˈmʌmbəl/

mumble

Meaning
To speak quietly and not clearly so that words are difficult to understand.
Example
He mumbled an apology before leaving.
B2 noun /ˌmɒdəˈreɪʃən/

moderation

Meaning
The avoidance of excess or extremes; keeping balance or within reasonable limits.
Example
He drinks wine in moderation.
C1 adjective /ˈmɜːki/

murky

濁った
Meaning
Dark, gloomy, and difficult to see through; obscure.
Example
We avoided swimming in the murky river.
私たちは濁った川で泳ぐのを避けました。
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。
C1 adjective /mɪˈrækjələs/

Miraculous

奇跡的; 驚くべき; 非凡な
Meaning
supernatural; amazing; extraordinary
Example
Her miraculous recovery amazed all the doctors.
彼女の奇跡的な回復は、すべての医師を驚かせました。
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。
C2 noun /mɪˈsænθrəpi/

misanthropy

人類嫌悪
Meaning
a general dislike, distrust, or hatred of humankind
Example
His misanthropy was evident in the way he avoided people.
彼の人類嫌悪は、彼が人々を避ける方法に明らかに現れていました。
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。
A2 noun /ˈmiːtɪŋ/

meeting

会議
Meaning
A gathering of people for discussion or decision-making.
Example
The board had a meeting to finalize the budget.
取締役会は予算を最終決定するために会議を開きました。
B1 adjective /ˈmɪzərəbəl/

Miserable

惨め; 不幸; 苦しみを引き起こす
Meaning
very unhappy; wretched; causing suffering
Example
He felt miserable after losing his job.
彼は仕事を失った後、ひどく落ち込んでいました。
C1 noun /ˈmjʊr.əl/

Mural

壁画
Meaning
a painting or artwork applied directly on a wall or ceiling
Example
The artist painted a beautiful mural on the school wall.
アーティストは学校の壁に美しいミューラルを描きました。
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。
C2 adjective /ˈmiː.di.əl/

medial

内側
Meaning
Situated in or pertaining to the middle; located toward the midline of the body or structure.
Example
The medial side of the knee is more prone to injury.
膝の内側は怪我をしやすい。
C1 noun /ˈmɔːr.ɡɪʤ/

Mortgage

住宅ローン
Meaning
a legal agreement by which a bank lends money to buy property
Example
They took out a mortgage to buy their first house.
彼らは最初の家を買うために住宅ローンを組みました。
C2 adjective /ˈmɔːrdənt/

mordant

Meaning
Having a sharp, critical, or biting quality; especially in humor.
Example
Her mordant wit often left her friends speechless.
C1 noun ˈmɪl.ɪ.tər.i ɪnˈkɜː.ʃən

military incursion

軍事侵入
Meaning
A sudden armed attack or invasion by military forces into a territory.
Example
The military incursion caused widespread devastation.
軍事侵入は広範囲にわたる破壊を引き起こしました。
C1 verb /ˈmiː.di.eɪt/

mediate

調停する
Meaning
To act as an intermediary in bringing about agreement or reconciliation between parties.
Example
She was asked to mediate between the two companies.
彼女は二つの会社の間で調停するよう求められました。
C1 adjective /maɪˈɑːpɪk/

myopic

近視的な、視野が狭い
Meaning
lacking foresight or long-term perspective; also refers to nearsightedness
Example
The company’s myopic strategy led to long-term losses.
その会社の近視的な戦略は、長期的な損失を招いた。
C2 adjective, adverb /ˌmæləprəˈpoʊ/

malapropos

不適切
Meaning
inappropriate or unsuitable; at an inconvenient or inappropriate time
Example
His comment was malapropos during the serious discussion.
真剣な議論中に彼のコメントは不適切だった。
C2 adjective /mɔːrˈdeɪʃəs/

mordacious

辛辣または皮肉な
Meaning
Sharp or biting in style, tone, or remark; sarcastic.
Example
The critic’s mordacious review offended the author.
批評家の辛辣なレビューは著者を怒らせた。
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。
C1 noun /ˈmɜːrdʒər/

merger

合併
Meaning
The combination of two or more companies into a single entity.
Example
The merger of the two firms created the largest bank in the region.
2社の合併により、地域で最大の銀行が設立されました。
B2 noun /ˈmɑːr.tɪn/

Martin

ツバメ
Meaning
small swift-flying bird that catches insects on the wing
Example
The martin built its nest under the bridge.
ツバメは橋の下に巣を作りました。
A2 noun /mɑːrk/

Mark

マーク; 記号; 点数
Meaning
A sign, symbol, or stain; a grade or score
Example
She received the highest mark in the mathematics examination.
彼女は数学の試験で最高点を取った。
B2 adjective /ˌmiː.diˈiː.vəl/

medieval

中世の
Meaning
Relating to the Middle Ages, the period in European history from about the 5th to the 15th century.
Example
The castle is a famous medieval monument.
その城は有名な中世の記念碑です。
B2 adjective /məˈkænɪkəl/

mechanical

幸せ
Meaning
relating to machines or the way they work
Example
She has a good understanding of mechanical systems.
彼女は賞を受け取ったとき、自分の幸せを隠すことができませんでした。
C2 noun /ˈmɛtrəˌnoʊm/

metronome

メトロノーム
Meaning
A device that produces regular ticks or beats to help musicians maintain tempo.
Example
She practiced the piano with a metronome to keep steady timing.
彼女は安定したタイミングを保つためにメトロノームを使ってピアノを練習していた。
A2 noun /mɪˈsteɪk/

Mistake

間違い; エラー;
Meaning
An action or judgment that is misguided or wrong; an error
Example
Making mistakes is part of the learning process.
間違いをすることは学習過程の一部です。
A1 modal verb, noun /meɪ/

may

かもしれない / 五月
Meaning
Used to express possibility, permission, or uncertainty; also the name of the fifth month of the year.
Example
You may leave early if you finish your work.
もし仕事が終わったら、早く帰ってもいいですよ。
C2 verb /ˈmæk.jʊˌleɪt/

maculate

汚す
Meaning
To stain, spot, or pollute something.
Example
The white cloth was maculated by ink stains.
白い布はインクのシミで汚れました。
A2 noun /ˈmiːdiə/

Media

メディア
Meaning
The main means of mass communication regarded collectively
Example
The news was widely reported in all forms of media.
ニュースはすべてのメディアで広く報道されました。
C1 noun /ˈmɑːrtər/

Martyr

殉教者
Meaning
A person who is killed because of their religious or political beliefs
Example
He became a martyr for the cause of freedom and democracy.
彼は自由と民主主義のために殉教者となった。
C2 noun /ˌmjuːtəˈbɪləti/

mutability

変動性
Meaning
The quality of being changeable or capable of change.
Example
The mutability of fashion trends makes it hard to keep up.
ファッションのトレンドの可変性は、それについていくのを難しくします。
A2 noun /ˈmæstər/

Master

達人; 専門家;
Meaning
A skilled practitioner of a particular art or activity; a teacher or expert
Example
Leonardo da Vinci was a master of both painting and sculpture.
レオナルド・ダ・ヴィンチは絵画と彫刻のマスターでした。
C2 noun /ˈmɒkəsɪn/

moccasin

モカシン
Meaning
A soft leather shoe, traditionally worn by Native Americans, often made from deerskin.
Example
He slipped on a pair of comfortable moccasins before going outside.
彼は外に出る前に快適なモカシンを履きました。
B1 noun /meɪt/

mate

友達, 相棒
Meaning
a friend or companion; a partner in marriage or reproduction
Example
He went fishing with his old school mate.
彼は古い学校の友達と釣りに行きました。
C1 noun ˌmɒd.ɪ.fɪˈkeɪ.ʃənz

modifications

修正
Meaning
The action of making partial or minor changes to something.
Example
DNA modifications enable enhanced traits in crops.
DNAの修正により作物の特性が向上します。
C2 adjective ˌmɔː.fəˈlɒdʒ.ɪ.kəl

morphological

語形成に関連する
Meaning
Related to the structure and formation of words; concerning morphology in linguistics.
Example
Morphological analysis helps AI understand word structures.
形態論的な分析はAIに言葉の構造を理解させる手助けをします。