montane
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C2 adjective /ˈmɒn.teɪn/

montane

山岳地帯に関連する; 山岳環境に見られる
Meaning
Relating to mountainous regions; found in mountain environments.
Example
Montane forests host a variety of unique species.
山岳林はユニークな種の多様性を持っています。
A1 verb /mʌst/

must

しなければならない
Meaning
to be required or obligated to
Example
You must complete your homework before you go out.
あなたは外出する前に宿題を終わらせなければなりません。
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。
C1 noun /ˌmɑːr.kɪ.təˈbɪl.ə.ti/

marketability

市場性
Meaning
The possibility of commercial success for a product or service
Example
The new product's marketability depends on consumer demand.
新しい商品の市場性は消費者の需要に依存しています。
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, verb /ˈmæn.deɪt/

mandate

マンダト
Meaning
an official order or command; to give someone authority to act in a certain way
Example
The government issued a mandate to reduce carbon emissions.
政府は炭素排出削減のためのマンダトを発行した。
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。
C1 noun ˌmɑːr.dʒɪ.nəl.aɪˈzeɪ.ʃən

marginalization

周縁化
Meaning
The treatment of a person, group, or concept as insignificant or peripheral.
Example
Economic policies should address the marginalization of the poor.
経済政策は貧困層の周縁化に対処すべきです。
C1 adjective ˌmiː.ti.ər.əˈlɒdʒ.ɪ.kəl

meteorological

気象の
Meaning
Relating to weather conditions and atmospheric phenomena.
Example
Meteorological conditions affect farming cycles.
気象条件は農業サイクルに影響を及ぼす。
B1 adjective, preposition, noun /mɪd/

mid

中間
Meaning
being in the middle of something; the central part or point
Example
She joined the project in mid June.
彼女は6月中旬にそのプロジェクトに参加した。
C1 adjective /miːk/

Meek

おとなしくて従順; 謙虚; 忍耐強い
Meaning
gentle and submissive; humble; patient
Example
Despite his power, he remained meek and humble.
力があっても、彼は謙虚で優しいままでした。
C2 noun /ˈmɜːkinəs/

murkiness

濁り
Meaning
The quality of being dark, gloomy, or unclear.
Example
The murkiness of the water made it hard to see the fish.
水の濁りが魚を見るのを難しくしました。
C2 verb /ˌmɪskənˈstruː/

misconstrue

誤解する
Meaning
To interpret something wrongly or misunderstand the meaning.
Example
She misconstrued his silence as anger.
彼女は彼の沈黙を怒りだと誤解した。
C1 noun /ˈmaɪzər/

miser

けちん坊
Meaning
A person who hoards wealth and spends as little money as possible.
Example
The old miser refused to donate even a penny to charity.
その古いけちん坊は慈善団体に1ペニーも寄付することを拒否した。
C1 verb /ˈməʊbɪlaɪz/

mobilize

動員する
Meaning
to organize or prepare people or resources for action
Example
The leader worked hard to mobilize the community for the protest.
リーダーは抗議のためにコミュニティを動員するために一生懸命働きました。
B1 adjective /ˈmæsɪv/

Massive

巨大な; 非常に大きい; サイズや量で巨大な
Meaning
extremely large; huge in size or amount
Example
The company made a massive profit this year.
その会社は今年、巨大な利益を上げました。
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。
A1 noun/verb /maɪnd/

mind

心 / 世話する
Meaning
the part of a person that enables them to think, feel, and reason; to pay attention or take care
Example
Please mind the gap between the train and the platform.
列車とプラットフォームの間の隙間に注意してください。
C2 noun /ˈmuːn.biːm/

moonbeam

月光
Meaning
A ray of light from the moon.
Example
A moonbeam lit up the quiet forest clearing.
月光が静かな森の開けた場所を照らした。
C2 noun /ˈmædrɪɡəl/

madrigal

Meaning
A short, lyrical poem set to music, typically from the Renaissance period.
Example
The choir performed a beautiful madrigal from the 16th century.
B1 noun /ˈmiːdiəm/

medium

メディア
Meaning
A means or channel of communication, expression, or artistic work.
Example
Television is a powerful medium for spreading information.
テレビは情報を広めるための強力なメディアです。
C2 noun /ˈmeɪleɪ/

melee

騒乱の戦い
Meaning
A noisy, confused fight or crowd situation.
Example
A melee broke out during the football match.
サッカーの試合中に騒乱の戦いが起きました。
C2 adjective /ˈmjuːlɪʃ/

mulish

Meaning
extremely stubborn or unwilling to change
Example
She remained mulish despite all the convincing arguments.
C1 noun ˌmɒdɪfɪˈkeɪʃn

modification

修正
Meaning
The action of making changes to something.
Example
The plan required modification.
計画には修正が必要でした。
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.
C1 adjective ˈmær.ɪ.taɪm

Maritime

海事の
Meaning
Connected with the sea, especially in relation to seafaring commercial or military activity.
Example
Maritime trade enhances the economy.
海上貿易は経済を促進する。
C1 verb /ˌmɪsˈmænɪdʒ/

mismanage

Meaning
to handle or control something badly or inefficiently
Example
The company went bankrupt because it was mismanaged for years.
C1 noun /ˌmɛrɪˈtɒkrəsi/

meritocracy

メリトクラシー
Meaning
A system in which advancement is based on individual ability or achievement.
Example
In a true meritocracy, the most capable people rise to leadership positions.
真のメリトクラシーでは、最も有能な人々がリーダーシップの地位に上がります。
C1 adverb /maɪˈnjuːtli/

Minutely

慎重に
Meaning
in very small detail; extremely carefully
Example
The detective examined the evidence minutely.
探偵は証拠を慎重に調べました。
C2 noun /ˈmʌs.tərd liːf/

Mustard leaf

マスタードの葉
Meaning
green leafy vegetable from the mustard plant; edible leaves used in cooking
Example
We cooked mustard leaf with fish in a traditional Bengali curry.
私たちは伝統的なベンガルカレーで魚と一緒にマスタードリーフを料理しました。
C1 noun mɪˈtɪkjʊləsnɪs

meticulousness

詳細への注意
Meaning
Great attention to detail; very careful and precise.
Example
His meticulousness made the project successful.
彼のメティキュラスネスはプロジェクトを成功させました。
C2 adjective /ˈmɔːrɪbʌnd/

Moribund

死にかけている; 衰退または腐敗の状態で
Meaning
near death; dying; in a state of decline or decay
Example
The moribund patient was in critical condition.
そのモリバンド患者は危機的な状態にありました。
C1 noun /ˈmoʊ.tər ˈlɔː.ri/

Motor lorry

トラック
Meaning
a large motor vehicle used for transporting goods; truck
Example
The motor lorry delivered fresh vegetables to the market.
そのモーター車は新鮮な野菜を市場に届けました。
B1 noun/adjective /ˈmæksɪməm/

maximum

最大
Meaning
the greatest or highest amount, value, or degree possible
Example
She scored the maximum marks in the exam.
彼女は試験で最大の点数を取った。
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。
C2 noun /ˈmɪsəleɪni/

miscellany

寄せ集め
Meaning
A collection or mixture of various things.
Example
The book is a miscellany of essays and poems.
その本はエッセイと詩の寄せ集めです。
A1 noun /miːt/

Meat

肉
Meaning
animal flesh used as food
Example
We bought fresh meat from the butcher shop.
私たちは肉屋から新鮮な肉を買いました。
C1 adjective /ˈmɔːrbɪd/

morbid

死や病気など、不快または不安を引き起こすテーマへの異常な関心
Meaning
Having an abnormal interest in disturbing or unpleasant subjects such as death or disease.
Example
She had a morbid fascination with crime stories.
彼女は犯罪の話に対してモービッドな魅力を持っていた。
B1 adjective /ˈmædʒɪkəl/

magical

Meaning
having or producing the charm, beauty, or power of magic
Example
The sunset over the mountains was a magical sight.
C1 adjective /ˈmuː.və.bl̩/

Movable

可動の; ポータブル; 移動可能
Meaning
capable of being moved; not fixed in position
Example
The furniture is movable so we can rearrange the room easily.
家具は可動なので、部屋を簡単に再配置できます。
C1 noun /məˈtɜːrnəti/

Maternity

母性
Meaning
The state of being a mother; motherhood
Example
The hospital has an excellent maternity ward for new mothers.
その病院は新しい母親のための優れたマタニティ病棟を提供しています。
C2 noun /ˈmænˌiː.tər/

man-eater

人食い
Meaning
An animal that kills and eats humans; informally, a woman who is very assertive in relationships.
Example
The tiger became a notorious man-eater in the village.
その虎は村で悪名高い人食いとなった。
C1 noun /moʊˈtiːf/

motif

Meaning
A recurring theme, subject, or idea in a work of art or literature.
Example
The motif of love is central to the novel.
C2 verb /ˈmɪlɪˌteɪt/

militate

妨げる
Meaning
to have a strong effect against something; to work as a powerful factor in preventing or influencing an outcome
Example
His lack of experience will militate against his promotion.
彼の経験不足が昇進に対して障害となるだろう。
C1 adjective /mʌnˈdeɪn/

mundane

平凡
Meaning
lacking interest or excitement; dull and ordinary
Example
She tried to escape her mundane routine by traveling.
彼女は旅行をして平凡な日常から逃げようとした。
C1 adjective /ˌmɛtəˈfɔːrɪkəl/

metaphorical

比喩的な
Meaning
Characteristic of or relating to metaphor; figurative rather than literal.
Example
He used metaphorical language to describe his emotions.
彼は感情を表現するために比喩的な言葉を使った。
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 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。
C1 noun /mɒnˈtɑːʒ/

montage

モンタージュ
Meaning
A sequence of film editing or a composite image made by combining several separate pictures.
Example
The film opened with a montage of city life.
映画は都市生活のモンタージュで始まりました。
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。
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.
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。
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。
A1 pronoun /maɪˈsɛlf/

myself

自分
Meaning
used for emphasis or to refer to oneself
Example
I will do it myself.
私は自分でそれをやります。
C2 verb /məˈlɪŋɡər/

malinger

病気を装う
Meaning
to exaggerate or fake illness in order to escape duty or work
Example
He tried to malinger to avoid going to school.
彼は学校に行くのを避けるためにマリンジャーしようとした。
A1 noun /mɪlk/

Milk

牛乳
Meaning
a white liquid produced by cows, goats, or other mammals, used as food
Example
Children need to drink milk for strong bones.
子供たちは強い骨のために牛乳を飲む必要があります。
C2 noun (plural) /ˌmæk.ɪˈneɪ.ʃənz/

machinations

陰謀
Meaning
complicated and secret plans, often intended to cause harm
Example
The politician was brought down by his own machinations.
その政治家は自分の陰謀によって倒れた。
B1 noun /ˈmʌs.əl/

Muscle

筋肉
Meaning
a body tissue consisting of fibers that can contract to produce movement
Example
Regular exercise helps strengthen your muscle.
定期的な運動は筋肉を強化するのに役立ちます。
C1 noun /ˈmænəˌrɪzəm/

Mannerism

癖
Meaning
A habitual gesture or way of speaking or behaving; an idiosyncrasy
Example
His constant throat clearing had become an annoying mannerism.
彼の絶え間ない喉の清掃は迷惑な癖になっていた。
C1 noun /ˈmɪs.hæp/

Mishap

災難; 不運; 事故
Meaning
An unlucky accident or unfortunate event, typically minor
Example
The cooking mishap resulted in a burnt dinner.
料理の失敗で、焼け焦げたディナーになった。
A2 verb /ˈmɑːrkɪt/

market

マーケティングする
Meaning
to promote and sell products or services; to advertise
Example
The company will market their new product through social media.
会社は新製品をソーシャルメディアでマーケティングする予定です。
A2 verb /ˈmɪsɪŋ/

missing

行方不明
Meaning
Being without or lacking; failing to be present or included.
Example
Many youths are missing economic opportunities.
多くの若者が経済的機会を逃しています。
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。
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。
A1 adverb /ˈmeɪbi/

maybe

たぶん
Meaning
used to express possibility or uncertainty
Example
Maybe we will go to the park tomorrow.
たぶん明日公園に行くでしょう。
C1 verb /məˈlɛst/

molest

嫌がらせ / 性的虐待
Meaning
to assault or abuse someone, especially in a sexual or physical way
Example
The criminal was arrested for attempting to molest a child.
犯罪者は子供を誘惑しようとしたため逮捕されました。
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。
C1 noun /mɔːs/

Moss

苔
Meaning
a small flowerless plant that grows in clumps in moist places
Example
Green moss covered the old stone wall.
緑の苔が古い石の壁を覆っていました。
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。
C2 noun /ˈmʌɡwʌmp/

mugwump

政党に属さない人
Meaning
a person who remains independent from party politics or remains aloof from disputes
Example
He was called a mugwump for refusing to join either political side.
彼は政治的な立場に参加しないことを拒否したため、マグワンプと呼ばれました。
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.
C1 noun /ˈmɪd.əl.mæn/

Middleman

仲介者
Meaning
A person who acts as an intermediary between two parties in a business transaction
Example
They decided to cut out the middleman and sell directly to customers.
彼らは仲介者を排除し、直接顧客に販売することに決めました。
B1 verb /mɛlt/

melt

溶ける
Meaning
to change from solid to liquid due to heat; to disappear gradually
Example
The ice melted in the sun.
氷は太陽の下で溶けました。
C2 noun /mjuːˈlætoʊ/

mulatto

混血の人（古くて攻撃的な言葉）
Meaning
an outdated and now offensive term historically used to describe a person of mixed white and Black ancestry
Example
The word 'mulatto' is now considered outdated and offensive.
'ムラット'という言葉は、現在では時代遅れで攻撃的だと見なされています。
C2 adjective /ˈmjuːtəbl/

mutable

可変の
Meaning
Capable of change or alteration.
Example
Human emotions are mutable and can shift rapidly.
人間の感情は可変的で、迅速に変わることがあります。
C2 adjective /ˈmiː.di.eɪ.tɪv/

mediative

仲裁に関連する
Meaning
Related to mediation, helping to resolve conflicts through diplomatic means.
Example
His mediative skills helped resolve the conflict.
彼の仲裁スキルは紛争を解決するのに役立った。
C2 noun /maɪˈkrɒmɪtər/

micrometer

マイクロメーター
Meaning
A device used for measuring small distances with great accuracy.
Example
The engineer used a micrometer to measure the thickness of the wire.
エンジニアはワイヤーの厚さを測るためにマイクロメーターを使いました。
C1 noun /miːlˈjuː/

milieu

環境
Meaning
A person's social environment or surroundings.
Example
She grew up in an artistic milieu.
彼女は芸術的な環境で育ちました。
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。
B1 noun /ˈmɪk.sər/

Mixer

ミキサー
Meaning
an electric kitchen appliance used for mixing, beating, and whipping ingredients
Example
The chef used a mixer to prepare the cake batter.
シェフはケーキの生地を作るためにミキサーを使いました。
A2 adjective /ˈmɪzɪkəl/

musical

音楽的
Meaning
related to or consisting of music
Example
She has a very musical voice.
彼女は非常に音楽的な声を持っています。
C1 adjective /ˌmɪsəˈleɪniəs/

Miscellaneous

雑多な; 混合された; 多様な
Meaning
various; diverse; mixed; assorted
Example
The box contained miscellaneous items from different periods.
箱には異なる時期のさまざまなアイテムが含まれていました。
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。
C2 noun /ˌmɪnəˈrɛt/

minaret

ミナレット
Meaning
A tall, slender tower of a mosque, from which the call to prayer is announced.
Example
The minaret of the mosque could be seen from miles away.
モスクのミナレットは数マイル先から見ることができました。
C2 noun mɒnəˈtɑːskɪŋ

monotasking

一度に一つの作業を行うこと
Meaning
The practice of dedicating oneself to a given task and minimizing potential interruptions until the task is completed or a significant period of time has elapsed.
Example
Monotasking can often lead to higher quality work.
モノタスキングはしばしば高品質な仕事につながります。
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。
C2 adjective /ˈmʌɡi/

muggy

蒸し暑くて湿気のある
Meaning
uncomfortably warm and humid
Example
It was a muggy afternoon in July.
7月の午後は蒸し暑かった。
C2 noun /ˌmɒnəˈmeɪniə/

monomania

Meaning
Excessive concentration or obsession with a single subject or idea.
Example
His monomania for collecting stamps worried his family.
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。
A2 interjection /mˈhm/

mm-hmm

はい
Meaning
A sound used to express agreement or acknowledgment in conversation.
Example
‘Do you understand?’ ‘Mm-hmm.’
‘分かりますか?’ ‘はい.’
C2 noun /ˈmeɪvən/

maven

専門家
Meaning
an expert or connoisseur in a particular field
Example
He is a tech maven who always knows the latest trends.
彼は最新のトレンドをいつも知っているテック専門家です。
C1 adjective /ˌmet.əˈbɒl.ɪk/

metabolic

代謝の
Meaning
Relating to the chemical processes that occur within a living organism in order to maintain life.
Example
Regular exercise enhances metabolic efficiency.
定期的な運動は代謝効率を高めます。
B1 verb /ˈmɛʒər/

measure

測定する
Meaning
to determine the size, amount, or degree of something
Example
She measured the length of the table.
彼女はテーブルの長さを測定しました。
C1 verb /mɔːl/

maul

傷つける
Meaning
To wound or injure someone by scratching or tearing; to handle roughly.
Example
The bear mauled the camper in the forest.
クマは森の中でキャンパーを傷つけました。
C1 verb /ˌmɪsˈriːd/

misread

誤って読む
Meaning
to read something incorrectly or interpret wrongly
Example
He misread the instructions and built the shelf incorrectly.
彼は指示を誤読して棚を間違って作った。
C2 noun /ˈmɪn.i.ən/

minion

手先
Meaning
A follower or underling of a powerful person, especially a servile one.
Example
The dictator was surrounded by loyal minions who carried out his orders.
独裁者は忠実な手先に囲まれていて、彼の命令を実行していた。
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。
C2 noun /ˈmɛndɪkənt/

mendicant

乞食
Meaning
a beggar; a person who lives by asking for alms
Example
The mendicant asked for food at the monastery gate.
乞食は修道院の門で食べ物を求めた。
B1 adverb /ˈmiːn.waɪl/

Meanwhile

その間
Meaning
at the same time; during the same period
Example
She was cooking dinner, meanwhile he was setting the table.
彼女は夕食を作っていた、その間、彼はテーブルを整えていた。
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。
C2 noun /ˌmɑːhəˈrɑːdʒə/

maharaja

マハラジャ
Meaning
A great king, especially a ruler of one of the principal states in India.
Example
The maharaja lived in a grand palace surrounded by gardens.
マハラジャは庭園に囲まれた豪華な宮殿に住んでいました。
B1 noun /ˈmʌðər ˈlæŋɡwɪdʒ/

mother language

母語
Meaning
the first language a person learns from childhood; native language
Example
Children learn best when they are taught in their mother language.
子どもは母語で学ぶと最もよく理解する。
C2 verb /ˈmæɡnɪtaɪz/

magnetize

磁化する
Meaning
to make something magnetic or to strongly attract
Example
The scientist managed to magnetize the iron rod.
科学者は鉄の棒を磁化することに成功した。
C2 noun /ˈmaʊntɪˌbæŋk/

mountebank

ペテン師
Meaning
A charlatan or trickster who deceives others, often for personal gain.
Example
The crowd was fooled by the mountebank’s false promises.
群衆はそのペテン師の虚偽の約束に騙されました。
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。
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。
C1 adjective /ˈmel.əʊ/

Mellow

柔らかくて心地よい; 落ち着いていて優しい
Meaning
soft and pleasant; relaxed and gentle
Example
The mellow evening light created a peaceful atmosphere.
穏やかな夕方の光が平和な雰囲気を作り出しました。
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 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。
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。
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。
C2 noun /maɪˈnjuːʃə/

minutia

細かい事
Meaning
a small or trivial detail of something
Example
He was bored by the minutia of office paperwork.
彼はオフィスの書類の細かい事に飽きていた。
A2 noun /ˈmeməri/

Memory

記憶
Meaning
The faculty by which the mind stores and remembers information
Example
She has an excellent memory for faces and names.
彼女は顔や名前を覚えるのが得意です。
C2 adjective /mæɡˈnɪləkwənt/

magniloquent

誇張した言葉
Meaning
using high-flown or pompous language
Example
The politician’s magniloquent speech impressed the crowd.
その政治家の誇張したスピーチは群衆に印象を与えた。
C1 noun /ˈmɔː.tər ænd ˈpes.əl/

Mortar and Pestle

モルタルと乳鉢
Meaning
a bowl and grinding tool used to crush and grind spices, herbs, and other substances
Example
She ground the spices using a mortar and pestle.
彼女はモルタルと乳鉢を使って香辛料を挽いた。
B2 noun /ˈmɛkəˌnɪzəm/

mechanism

機構
Meaning
A system of parts working together in a machine; a process or technique for achieving something.
Example
The mechanism of the clock stopped working after years of use.
時計の機構は長年の使用後に動作を停止した。
C1 noun /mælˈpræktɪs/

Malpractice

職業上の不正行為
Meaning
Improper, illegal, or negligent professional behavior
Example
The surgeon was sued for malpractice after the failed operation.
外科医は手術に失敗した後、マルプラクティスで訴えられました。
C1 adjective /ˈmjuːtɪd/

muted

muted (ミューテッド)
Meaning
softened in sound, color, or effect; subdued
Example
The room was painted in muted shades of blue and grey.
部屋は青と灰色の muted な色合いで塗られていました。
C1 adjective /ˌmaɪ.krəˈskɑː.pɪk/

microscopic

顕微鏡的
Meaning
Extremely small and only visible with a microscope.
Example
The sample contained microscopic particles.
サンプルには顕微鏡的な粒子が含まれていました。
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 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。