nucleus
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C1 noun ˈnuːkliəs

nucleus

原子核
Meaning
The central core of an atom containing protons and neutrons.
Example
The nucleus consists of protons.
原子核は陽子で構成されています。
A2 verb /noʊt/

note

ノートする
Meaning
to write down or observe something; to pay attention to
Example
Please note the important points during the lecture.
講義中に重要な点をノートしてください。
A2 adjective /ˈnɔɪ.zi/

Noisy

騒々しい
Meaning
making a lot of loud or unpleasant sound; clamorous
Example
The noisy construction work outside made it difficult to concentrate.
外の騒々しい建設作業で集中するのが難しかった。
A2 adjective /ˈnæsti/

nasty

嫌な
Meaning
very unpleasant, unkind, or offensive
Example
He made a nasty comment about her dress.
彼は彼女のドレスについて嫌なコメントをしました。
A2 adverb /ˈnaɪsli/

nicely

上手に
Meaning
in a pleasant, kind, or satisfactory manner; carefully and appropriately
Example
She explained the problem nicely so everyone could understand.
彼女はみんなが理解できるように上手に説明した。
C1 verb /nəˈsɛsɪteɪt/

necessitate

必要とする
Meaning
To make something necessary or unavoidable.
Example
The heavy rains necessitated the cancellation of the event.
激しい雨はイベントのキャンセルを避けられないものにしました。
B1 adjective /ˈneɪtɪv/

native

ネイティブ
Meaning
Belonging to a person by birth; originating in a particular place.
Example
He is a native speaker of Bengali.
彼はベンガル語のネイティブスピーカーです。
B2 noun /ˈnuː.tri.ənt/

nutrient

栄養素
Meaning
A substance that provides nourishment essential for growth and health of plants or animals.
Example
Plants absorb nutrients from the soil for growth.
植物は成長のために土壌から栄養素を吸収します。
B2 verb /nɒd/

nod

うなずく
Meaning
to move one's head down and up to show agreement or acknowledgment
Example
She nodded in agreement with the proposal.
彼女は提案に同意してうなずいた。
A1 verb /neɪm/

name

名付ける
Meaning
to give a title or designation to someone or something
Example
They decided to name their baby Sarah.
彼らは赤ちゃんにサラという名前を付けることに決めました。
C1 noun /ˌnjʊə.roʊ.plæˈstɪs.ɪ.ti/

neuroplasticity

神経可塑性
Meaning
The brain's ability to reorganize itself by forming new neural connections throughout life.
Example
Neuroplasticity allows the brain to rewire itself after an injury.
ニューロプラスティシティは、脳が怪我の後で再配線できるようにします。
C2 noun /nɪb/

nib

ペン先
Meaning
the pointed end of a pen used for writing or drawing
Example
He dipped the nib into the ink before writing.
彼は書く前にペン先をインクに浸しました。
A1 pronoun /ˈnʌθɪŋ/

nothing

何もない
Meaning
not anything; no thing
Example
She has nothing to worry about.
彼女は心配することは何もない。
C1 noun ˈnærətɪv staɪl

narrative style

物語のスタイル
Meaning
The way in which a story is told, including the point of view and the voice of the narrator.
Example
Dickens' narrative style is engaging and emotional.
ディケンズの物語のスタイルは魅力的で感情的です。
C2 noun /ˈnaɪɪˌlɪzəm/

nihilism

虚無主義
Meaning
The rejection of all religious and moral principles, often in the belief that life is meaningless.
Example
The philosopher was criticized for promoting nihilism.
哲学者はニヒリズムを推進したとして批判されました。
A2 pronoun /nʌn/

none

誰もいない
Meaning
not any; no one; not one
Example
None of the students passed the exam.
誰もその試験に合格しませんでした。
B2 adverb /ˈnæʃənəli/

nationally

全国的に
Meaning
at the level of a whole nation; in a way that involves or affects an entire country
Example
The policy was implemented nationally to ensure equal benefits for all citizens.
その政策は、すべての市民に平等な利益を確保するため、全国的に実施された。
C2 verb /ˈnɪɡəl/

niggle

Meaning
to cause slight but persistent annoyance, discomfort, or worry
Example
A small doubt niggled at her mind.
C2 adjective /ˌnjuːmɪzˈmætɪk/

numismatic

貨幣学の
Meaning
relating to the study or collection of coins, currency, and medals
Example
He has a numismatic collection of rare coins from around the world.
彼は世界中からの珍しいコインの収集を持っています。
B2 noun /næˈreɪʃən/

narration

ナレーション
Meaning
The act of telling a story or describing events in detail.
Example
The movie’s narration was done by a famous actor.
映画のナレーションは有名な俳優によって行われました。
B2 noun /ˌnəʊtɪfɪˈkeɪʃən/

notification

通知
Meaning
an official or formal notice or message informing someone of something; an alert delivered by a system or device
Example
You will receive a notification when your application is approved.
申請が承認されると通知が届きます。
C1 noun /nɑːtʃ/

notch

切り込み
Meaning
A small cut or groove on the edge or surface of something; a level or degree of achievement.
Example
He carved a notch on the stick to mark the days.
彼は日数を記録するために棒に切り込みを入れました。
B2 adjective /nəˈtɔːriəs/

notorious

悪名高い
Meaning
Famous or well-known for something bad or undesirable
Example
The area is notorious for its high crime rate.
その地域は高い犯罪率で悪名高いです。
A1 noun /noʊˈvɛmbər/

november

11月
Meaning
the eleventh month of the year in the Gregorian calendar
Example
November is often cool and quiet before winter begins.
11月は冬が始まる前で、涼しく静かなことが多い。
C1 adjective + noun njuˈtrɪʃəs krɒps

nutritious crops

栄養豊富な作物
Meaning
Plants or vegetables that are rich in nutrients and beneficial for health
Example
Winter vegetables are considered nutritious crops.
冬の野菜は栄養価の高い作物と見なされています。
A2 noun /ˈnɛtˌwɜrk/

network

ネットワーク
Meaning
A system of interconnected people, things, or computers.
Example
She built a strong professional network.
彼女は強力なプロフェッショナルネットワークを作り上げた。
C2 adjective /ˈnɛðər/

nether

下の
Meaning
situated down or below; lower
Example
They explored the nether regions of the cave.
彼らは洞窟の下の地域を探索した。
C2 noun /nəˈkrɒpəlɪs/

necropolis

古代の墓地
Meaning
a large ancient cemetery with elaborate tombs
Example
The archaeologists discovered artifacts in the necropolis of the ancient city.
考古学者たちは古代都市のネクロポリスで遺物を発見しました。
C1 noun /ˈnɑːrsɪsɪst/

narcissist

ナルシシスト
Meaning
A person who has an excessive interest in or admiration of themselves.
Example
Everyone avoided him because he was a narcissist.
みんな彼を避けていた、なぜなら彼はナルシシストだったから。
C1 noun /ˈnep.ə.tɪz.əm/

Nepotism

縁故主義
Meaning
the practice of favoring relatives or friends in business or politics
Example
The company was accused of nepotism in its hiring practices.
その会社は採用活動においてネポティズムを行っていると非難された。
C2 noun /niːˈɒlədʒɪzəm/

neologism

新造語
Meaning
A newly coined word or expression.
Example
The internet has given rise to many neologisms like 'selfie' and 'hashtag'.
インターネットは「セルフィー」や「ハッシュタグ」などの多くの新造語を生み出しました。
C2 noun /nɛˈkroʊsɪs/

necrosis

壊死
Meaning
the death of body tissue due to disease, injury, or lack of blood supply
Example
The doctor explained that the patient’s wound showed signs of necrosis.
医師は、患者の傷が壊死の兆候を示していると説明しました。
B1 adjective /ˈnɔːðərn/

northern

北部の
Meaning
relating to the north or situated in the north
Example
The northern part of the country is known for its cold climate.
その国の北部は寒冷な気候で知られています。
B1 noun /ˈnɑn.sens/

Nonsense

ナンセンス
Meaning
words or language that have no meaning; foolish or unacceptable behavior
Example
Stop talking nonsense and be serious!
ナンセンスなことを言うのはやめて、真剣になりなさい！
C1 verb /ˈnʌlɪfaɪ/

nullify

無効にする
Meaning
to make something legally invalid or ineffective
Example
The court decided to nullify the contract.
裁判所は契約を無効にすることを決定しました。
C2 noun /ˈnaɪəlɪst/

nihilist

ニヒリスト
Meaning
A person who rejects all religious and moral principles, often believing that life is meaningless.
Example
He was called a nihilist for rejecting all social norms.
彼はすべての社会的規範を拒否したため、ニヒリストと呼ばれました。
B2 adverb /ˌnɛvəðəˈlɛs/

nevertheless

Meaning
in spite of that; however
Example
He was tired; nevertheless, he kept working.
C1 verb /ˈnɔːrməlaɪz/

normalize

正常化する
Meaning
to bring something back to a normal or standard condition; to make something conform to a standard
Example
The government took steps to normalize relations with neighboring countries.
政府は関係を正常化するための措置を取った。
B2 noun nɪˈsesɪti

necessity

必要性
Meaning
The fact of being required or indispensable; an indispensable thing.
Example
Waste management is a necessity for environmental sustainability.
廃棄物管理は環境の持続可能性にとって必要不可欠です。
B2 adjective, verb /ˈnoʊtɪd/

noted

著名
Meaning
well known or famous; written down or observed
Example
He is a noted author in the field of history.
彼は歴史分野で著名な作家です。
C1 noun /noʊˈteɪʃən/

notation

記号法
Meaning
A system of symbols or signs used to represent information, especially in mathematics or music.
Example
The teacher explained the notation used in the algebra equations.
先生は代数方程式で使用される記号法を説明しました。
C2 adjective /ˈnjuːmɪnəs/

numinous

神秘的
Meaning
having a strong spiritual or mysterious quality
Example
The temple had a numinous atmosphere that inspired awe.
その寺院は畏敬の念を抱かせる神秘的な雰囲気を持っていました。
A2 adverb /ˈnɔːməli/

Normally

通常
Meaning
in the usual way; under normal circumstances
Example
I normally wake up at 7 AM every day.
私は通常毎日午前7時に起きます。
C2 adjective /ˈnɔɪ.səm/

Noisome

不快な臭い; 有害または不快な
Meaning
having an extremely offensive smell; harmful or unpleasant
Example
The noisome smell from the garbage made everyone cover their noses.
ゴミからの不快な臭いが、みんなを鼻を押さえさせました。
C2 adjective /ˌnɒndɪˈskrɪpt/

nondescript

特徴のない
Meaning
Lacking distinctive or interesting features; dull and unremarkable.
Example
He lives in a nondescript apartment building on the edge of town.
彼は町の外れにある特徴のないアパートに住んでいます。
C2 noun /ˈnɑːstrəm/

nostrum

効果のない薬
Meaning
a medicine or remedy, especially one that is not considered effective; a questionable solution
Example
The politician’s plan was dismissed as a mere nostrum for a complex problem.
政治家の計画は、複雑な問題に対する単なる効果のない薬として退けられました。
C1 noun /ˈnɛkˌlaɪn/

neckline

ネックライン
Meaning
the edge of a garment around the neck, especially as cut to form a particular shape
Example
The dress has a beautiful V-shaped neckline.
そのドレスには美しいV字型のネックラインがあります。
C2 noun /næˈteɪʃən/

natation

水泳
Meaning
The act or sport of swimming.
Example
She took lessons in natation to improve her swimming skills.
彼女は泳ぎの技術を向上させるために水泳のレッスンを受けました。
B2 verb /ˈnoʊtɪfaɪ/

notify

通知する
Meaning
to inform someone officially about something
Example
The manager will notify the staff about the schedule change.
マネージャーはスタッフにスケジュールの変更について通知します。
C2 noun /ˌnɒn ˈsɛkwɪtər/

non sequitur

論理的に関連しない発言
Meaning
a statement or conclusion that does not logically follow from the previous statement
Example
His comment about the weather was a complete non sequitur during the budget discussion.
予算の議論中、彼の天気に関するコメントは完全に論理的に関連しない発言だった。
C2 noun /ˌnɛɡlɪˈʒeɪ/

negligee

軽いシルクの寝間着
Meaning
A woman's light dressing gown, often made of thin or silky material.
Example
She wore a silk negligee before going to bed.
彼女は寝る前にシルクのネグリジェを着ていました。
C1 adjective /ˈnjuː.tri.ənt dɛns/

nutrient-dense

栄養価が高い
Meaning
Rich in nutrients and high nutritional value.
Example
Organic food is often more nutrient-dense than processed food.
オーガニック食品は、加工食品よりも栄養価が高いことがよくあります。
C1 noun ˌnæʃ.ən.ə.laɪˈzeɪ.ʃən

nationalization

国有化
Meaning
The process of a government taking control of private property or industry.
Example
The nationalization of banks was aimed at stabilizing the economy.
銀行の国有化は経済の安定を目指して行われました。
B2 noun ˈneɪʧər ɪnˈθjuːziæsts

Nature Enthusiasts

自然愛好家
Meaning
People who have a passionate interest in and love for the natural world and outdoor activities.
Example
Nature enthusiasts often visit Sajek Valley for its scenic beauty.
自然愛好家は、その美しい景色のためにサジェックバレーを訪れることがよくあります。
C2 adjective /ˈnjuːbaɪl/

nubile

未婚女性
Meaning
of a young woman, sexually mature and suitable for marriage
Example
The village was celebrating the festival with its nubile maidens dancing.
村はその未婚女性たちが踊る祭りを祝っていました。
C1 noun /ˈneb.jʊ.lə/

nebula

星雲
Meaning
A cloud of gas and dust in outer space, sometimes visible in the night sky.
Example
The Orion Nebula is one of the brightest in the sky.
オリオン星雲は空で最も明るいものの一つです。
C1 adjective /nɪˈɡlɛktfʊl/

neglectful

無関心
Meaning
Failing to give proper care or attention.
Example
The neglectful parent left the child alone for hours.
無関心な親は子供を何時間も一人で放置した。
C1 adjective /ˈneɡ.lɪ.dʒə.bəl/

Negligible

無視できる
Meaning
so small or unimportant as to be not worth considering; insignificant
Example
The side effects of this medicine are negligible.
この薬の副作用は無視できるほどです。
A1 adverb /ˈnɛvər/

never

決して
Meaning
at no time in the past or future; not ever
Example
I have never seen such a beautiful sunset.
私はこんなに美しい夕日を決して見たことがありません。
C2 noun /nɑːrˈsɪsəs/

narcissus

ナルシスの花
Meaning
A type of flowering plant with yellow or white blooms, often associated with self-love from Greek mythology.
Example
A narcissus bloomed in the garden during spring.
春に、庭でナルシスの花が咲きました。
C2 noun /naɪt kwiːn/

Night queen

月下香
Meaning
a fragrant white flower that blooms at night and releases strong sweet scent
Example
The night queen flowers filled the garden with their sweet fragrance.
月下香の花が甘い香りで庭を満たしました。
C1 noun ˌnæn.oʊ.tekˈnɒl.ə.dʒi

nanotechnology

ナノテクノロジー
Meaning
The branch of technology that deals with dimensions and tolerances of less than 100 nanometers.
Example
Nanotechnology is advancing medical treatments.
ナノテクノロジーは医療治療の進歩を促進しています。
B2 adjective /ˈneɪ.kɪd/

Naked

裸; 衣服なし; 暴露された; 無防備
Meaning
without clothes or covering; bare; exposed; unclothed
Example
The naked truth about the situation shocked everyone.
その状況についての裸の真実は、皆を驚かせました。
C1 adjective /ˈnɔːrmətɪv/

normative

規範的
Meaning
relating to rules, standards, or norms that govern behavior or beliefs
Example
The study focused on the normative aspects of cultural behavior.
その研究は文化的な行動の規範的側面に焦点を当てました。
B2 adjective /ˈnjuː.mər.əs/

Numerous

多数の; たくさんの; 豊富な
Meaning
existing in large numbers; many; abundant
Example
There are numerous benefits to exercising regularly.
定期的な運動には数多くの利点があります。
C1 adjective /ˈnɔɪz.ləs/

Noiseless

無音の; 完全に静かな
Meaning
making no sound; completely silent
Example
She moved through the house in noiseless steps so as not to wake the baby.
彼女は赤ちゃんを起こさないように、無音で家の中を歩きました。
B2 noun /ˌnɔːrθˈiːst/

northeast

北東
Meaning
the direction between north and east; a region or area located in that direction.
Example
The storm is moving toward the northeast.
嵐は北東に向かって進んでいます。
B2 adverb /ˈneɪmli/

Namely

すなわち; 特に;
Meaning
that is to say; specifically; to be precise
Example
Three cities, namely Paris, London, and Rome, were visited.
三つの都市、すなわちパリ、ロンドン、ローマが訪問されました。
C2 adjective /ˈnɛtlˌsʌm/

nettlesome

苛立たしい
Meaning
Causing irritation, annoyance, or difficulty.
Example
The nettlesome rules frustrated the workers.
苛立たしい規則は労働者たちを苛立たせました。
A1 verb /niːd/

need

必要
Meaning
to require something; to be in want of
Example
I need help with my homework.
私は宿題に助けが必要です。
C2 adjective /ˌnɒnkəˈmɪtl̩/

noncommittal

Meaning
Not expressing or showing a clear opinion, decision, or commitment.
Example
She gave a noncommittal reply when asked about her future plans.
C2 noun /niːˈɒkrəsi/

neocracy

未熟なまたは新しい官僚によって運営される政府
Meaning
A government or leadership run by inexperienced or new officials.
Example
The sudden revolution led to a neocracy with inexperienced leaders.
突然の革命は未経験のリーダーたちによるネオクラシーを生み出した。
C2 adjective /ˈnɪɡərdli/

niggardly

ケチ
Meaning
unwilling to spend or give; stingy or miserly
Example
He was too niggardly to leave a decent tip.
彼はまともなチップを置くにはあまりにケチだった。
C1 noun /ˈneɪ.vəl/

Navel

へその緒
Meaning
the small hollow in the center of the stomach where the umbilical cord was attached
Example
The baby's navel cord fell off after a week.
赤ちゃんのへその緒は1週間後に取れました。
B2 adverb /ˌnʌnðəˈlɛs/

nonetheless

それにもかかわらず
Meaning
in spite of that; nevertheless
Example
It was raining, but nonetheless, they went hiking.
雨が降っていましたが、それにもかかわらず、彼らはハイキングに行きました。
C1 noun /ˈnɔː.zi.ə/

Nausea

吐き気
Meaning
a feeling of sickness with an inclination to vomit
Example
The motion of the boat caused severe nausea.
ボートの動きがひどいナウジアを引き起こしました。
C1 noun ˈnɛktər

Nectar

蜜
Meaning
A sweet liquid produced by flowers that serves as food for butterflies.
Example
Butterflies drink nectar from flowers.
蝶々は花からネクターを飲みます。
B1 adjective /ˈnær.oʊ/

Narrow

狭い; 限定された; 狭まった
Meaning
having a small width; thin; limited in scope; restricted
Example
The narrow street was barely wide enough for two cars.
その狭い道は2台の車が通るにはほとんど十分な広さがありませんでした。
C1 verb /ˈnɪbəl/

nibble

かじる
Meaning
to take small bites of food
Example
The rabbit nibbled on a carrot.
うさぎはにんじんをかじった。
A2 noun /ˈnæpkɪn/

napkin

ナプキン
Meaning
a piece of cloth or paper used to wipe the mouth and hands while eating
Example
She placed a napkin on her lap before eating.
彼女は食事の前に膝の上にナプキンを置きました。
C2 noun /nɪt/

nit

シラミの卵
Meaning
The egg or young form of a louse or other parasitic insect.
Example
The teacher noticed nits in the child’s hair.
先生は子供の髪の毛にシラミの卵を見つけました。
B1 noun /ˌnæʃəˈnæləti/

nationality

国籍
Meaning
The status of belonging to a particular nation, either by birth or naturalization.
Example
Her nationality is Canadian, though she was born in France.
彼女の国籍はカナダのもので、フランスで生まれました。
B2 noun, adjective, adverb /ˌnɔːrθˈwest/

northwest

北西
Meaning
the direction that is between north and west; situated in or moving toward this direction
Example
Seattle is located in the northwest of the United States.
シアトルはアメリカ合衆国の北西部にあります。
C2 noun /niˈɒlədʒi/

neology

新しい言葉の使用またはその起源の研究
Meaning
The use of new words or the study of their origin.
Example
The professor specialized in neology, studying the creation of modern slang.
教授はネオロジーを専門とし、現代のスラングの創造を研究しました。
C1 verb /ˈnjuːtrəlaɪz/

neutralize

無力化する
Meaning
to make something ineffective or harmless
Example
The medicine helped neutralize the poison in his system.
その薬は彼の体内の毒を無効にするのを助けました。
C2 adjective /ˈneɪtl/

natal

出生に関連する
Meaning
Relating to birth or the place of birth.
Example
She returned to her natal village after many years.
彼女は何年も経った後、故郷の村に帰りました。
C1 adjective /nɑːkˈtɜr.nəl/

Nocturnal

夜行性
Meaning
active at night; happening during the night
Example
Owls are nocturnal animals that hunt at night.
フクロウは夜行性の動物で、夜に狩りをします。
B1 noun /ˈnɜːrsɪŋ/

nursing

看護
Meaning
the profession or practice of caring for the sick or injured
Example
She is studying nursing to become a healthcare professional.
彼女は医療専門職になるために看護学を学んでいます。
C2 noun /ˈnʌnəri/

nunnery

修道院
Meaning
A convent or building where nuns live and work.
Example
She decided to join the nunnery to devote her life to spiritual practice.
彼女は精神的な実践に人生を捧げるために修道院に参加することを決めました。
C1 noun /ˈneɡ.lɪ.dʒəns/

Negligence

過失
Meaning
failure to take proper care in doing something; carelessness
Example
The accident was caused by driver negligence.
事故は運転手の不注意によって引き起こされました。
A2 conjunction /ˈniːðər/

neither

どちらも〜ない
Meaning
used to connect two negative alternatives
Example
Neither the manager nor the assistant could attend the meeting.
マネージャーもアシスタントも会議に出席できなかった。
B2 adjective /ˈnær.ə.tɪv/

Narrative

物語的な; 描写的な; 物語を語る
Meaning
relating to storytelling; descriptive; telling a story; recounting events
Example
The narrative structure of the novel was quite complex.
その小説の物語的な構造はかなり複雑でした。
A2 noun /ˈneɪ.bər/

Neighbour

隣人; 近く
Meaning
a person who lives near or next to another person
Example
My neighbour is very friendly and helpful.
私の隣人はとても親切で役に立ちます。
C2 adjective /ˈnjuː.ɡə.tɔːr.i/

nugatory

無価値
Meaning
Of little or no value; worthless or insignificant.
Example
His efforts were nugatory and did not change the outcome.
彼の努力は無価値で、結果を変えることはなかった。
C2 noun /ˌnjʊə.rəʊˈdʒɛn.ɪ.sɪs/

neurogenesis

新しい神経細胞の形成プロセス
Meaning
The process of forming new nerve cells in the brain.
Example
Scientists are studying neurogenesis to understand brain health.
科学者たちは神経発生を研究して、脳の健康を理解しようとしています。
C2 noun /nuːt/

Newt

イモリ
Meaning
a small amphibian with a long tail that lives both in water and on land
Example
The newt swam gracefully in the pond.
イモリは池で優雅に泳いでいました。
B2 noun /ˌnoʊtɪfɪˈkeɪʃənz/

notifications

通知
Meaning
A notice or announcement, especially an official one.
Example
Turn off notifications to stay focused.
通知をオフにして集中を保つ。
C1 noun /ˈneɪ.vəl fɔːrs/

Naval Force

海軍
Meaning
the branch of a nation's armed services that conducts military operations at sea
Example
The naval force protected the country's coastline from enemy attacks.
海軍は敵の攻撃から国の海岸線を守った
C1 adjective /ˈnæs.ənt/

nascent

発展途上の
Meaning
Emerging, developing, or in the early stages of formation
Example
The nascent technology is revolutionizing industries.
発展途上の技術が産業を革新しています。
C2 noun /ˈnaɪsəti/

nicety

微細さ
Meaning
a fine or subtle detail, or a refined, delicate aspect of something
Example
The lawyer explained the legal niceties of the case.
弁護士は事件の法的細部を説明しました。
A2 adjective /ˈnɜː.vəs/

Nervous

神経質な, 緊張した
Meaning
feeling anxious or worried; relating to the nerves; easily agitated
Example
She felt nervous before her job interview.
彼女は面接の前に緊張していた。
B1 noun /ˈneɪbərˌhʊd/

neighborhood

近所
Meaning
a district or area around or near a particular place
Example
I grew up in a quiet neighborhood.
私は静かな近所で育ちました。
C1 noun /naɪˈiːvteɪ/

naivete

Meaning
The quality of being naive; lack of experience, wisdom, or judgment.
Example
His naivete made him an easy target for manipulation.
C2 noun /ˈnɛtl̩/

nettle

触れると痛みを引き起こす植物
Meaning
a plant with stinging hairs that cause irritation when touched
Example
He accidentally brushed against the nettle and felt a sharp sting.
彼は不注意でイラクサに触れて鋭い痛みを感じた。
C1 noun /ˈnɒnʃələns/

nonchalance

無頓着
Meaning
A relaxed and calm state, showing lack of concern or interest.
Example
She answered the tough questions with surprising nonchalance.
彼女は驚くべき無頓着で難しい質問に答えました。
C2 noun /ˌniːoʊˈdɑːrwɪnɪzəm/

neo-darwinism

ネオダーウィニズム
Meaning
A modern interpretation of Darwin's theory of evolution, integrating genetics and natural selection.
Example
Neo-Darwinism combines Darwin’s theory of natural selection with modern genetics.
ネオダーウィニズムはダーウィンの自然選択説と現代遺伝学を組み合わせています。
A2 verb /nɜːrs/

nurse

看護する
Meaning
to care for someone who is sick or injured; to feed a baby
Example
She nursed her sick mother back to health.
彼女は病気の母親の世話をして、元気を取り戻させました。
C1 adjective /nəʊˈmæd.ɪk/

nomadic

遊牧
Meaning
Living the life of a nomad; wandering from place to place without a fixed home.
Example
The tribe led a nomadic lifestyle.
部族はノマディックなライフスタイルを送っていた。
C2 noun /ˈneɪdɪər/

nadir

Meaning
The lowest point of a situation or condition.
Example
The company reached its nadir during the financial crisis.
C1 noun /noʊz rɪŋ/

Nose ring

鼻リング
Meaning
a piece of jewelry worn through a piercing in the nose
Example
She got a small gold nose ring for her birthday.
彼女は誕生日に小さな金の鼻リングをもらった。
B2 noun, verb /nɜːrv/

nerve

神経; 勇気
Meaning
A bundle of fibers in the body that transmits signals between the brain and other parts; also courage or audacity.
Example
She gathered the nerve to speak in front of the large audience.
彼女は大きな観客の前で話す勇気を持っていた。
B2 adverb /ˌnɒnˈstɒp/

Non-stop

ノンストップ; 途切れなく
Meaning
continuing without stopping; without interruption
Example
The train traveled non-stop from London to Paris.
その列車はロンドンからパリまでノンストップで走った。
C1 noun /ˈnɔːrmən/

Norman

Meaning
A member of a people of mixed Scandinavian and Frankish origin who settled in Normandy, or relating to their culture.
Example
The Normans conquered England in 1066.
B2 noun /ˈnæʃənəl ˈænθəm/

national anthem

国歌
Meaning
an official patriotic song of a country, performed at national events and ceremonies
Example
The national anthem was played before the international match.
国際試合の前に国歌が演奏された。
C1 noun /niːʃ/

Niche

市場のニッチ、専門分野、ターゲット市場
Meaning
A specialized segment of the market for a particular kind of product or service.
Example
Finding the right niche is key to a successful business.
適切なニッチを見つけることが、成功するビジネスの鍵です。
B2 adjective /ˈnoʊtəbl/

notable

顕著な
Meaning
worthy of attention or notice; remarkable
Example
She made a notable contribution to the project.
彼女はプロジェクトに顕著な貢献をしました。
C1 adjective /ˈnɒm.ɪ.nəl/

Nominal

名目上の; 非常に小さい
Meaning
very small in size or amount; existing in name only
Example
He paid only a nominal fee for the membership since he was a student.
彼は学生だったので、会員費はわずかな名目料金でした。
B2 verb /ˈnæv.ɪ.ɡeɪt/

navigate

ナビゲート
Meaning
To plan and direct the route or course of a ship, aircraft, or other form of transport.
Example
The GPS helps navigate complex routes.
GPSは複雑なルートをナビゲートするのに役立ちます。
C1 adjective /ˈnɑːkʃəs/

noxious

有害な
Meaning
harmful, poisonous, or very unpleasant
Example
The factory released noxious fumes into the air.
工場は空気中に有害な煙を放出した。
C1 noun /nɪl/

Nil

ゼロ; 何もない
Meaning
nothing; zero; no amount
Example
His chances of winning were nil after the scandal.
スキャンダル後、彼の勝つチャンスはゼロになった。
A2 noun (plural) /ˈnuːdəlz/

noodles

麺
Meaning
long, thin strips of dough made from flour, water, or eggs, cooked and eaten as food
Example
She cooked noodles with vegetables for dinner.
彼女は夕食に野菜入りの麺を作った。