slacken
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C1 verb /ˈslækən/

slacken

緩める
Meaning
to make or become less tight, less active, or slower
Example
The driver slackened his speed as he approached the village.
運転手は村に近づくにつれて速度を緩めた。
B2 noun ˈsʌbˌaɪtəlz

subtitles

字幕
Meaning
Captions displayed at the bottom of a movie or television screen that translate or transcribe the dialogue or narrative.
Example
Use subtitles for better understanding.
より良い理解のために字幕を使用してください。
C1 adjective /ˈsiː.di/

Seedy

種でいっぱい; 汚くて評判が悪い; 廃れた
Meaning
squalid and disreputable; shabby and run-down; full of seeds
Example
They avoided walking through the seedy part of town at night.
彼らは夜に汚くて評判が悪い街の部分を歩くのを避けていた。
C2 verb /ˈseɪʃiˌeɪt/

satiate

満たす
Meaning
To satisfy fully, especially with food or desire.
Example
The large meal satiated his hunger.
大きな食事が彼の空腹を満たしました。
B2 noun /sɪmˈplɪsɪti/

Simplicity

単純さ; 明確さ
Meaning
the quality of being simple; lack of complexity or intricacy
Example
The beauty of the design lies in its simplicity.
デザインの美しさはその単純さにあります。
B2 verb səˈpres

suppress

抑制する
Meaning
To forcibly put an end to; to restrain or subdue.
Example
Authorities must suppress criminal activities in campuses.
当局はキャンパス内の犯罪行為を抑制しなければならない。
C1 adjective /səbˈsɜːviənt/

subservient

Meaning
prepared to obey others unquestioningly; less important than something else
Example
She was too subservient to challenge his decision.
A2 adjective /ˈsʌn.i/

Sunny

晴れた; 楽観的な
Meaning
bright with sunlight; cheerful and optimistic
Example
It's a beautiful sunny day perfect for a picnic.
今日は素晴らしい晴れた日で、ピクニックに最適です。
B2 noun /ˈsæksəfoʊn/

Saxophone

サクソフォン
Meaning
a wind musical instrument with a curved metal body and a single reed mouthpiece
Example
The jazz musician played a beautiful solo on his saxophone.
ジャズのミュージシャンは自分のサクソフォンで美しいソロを演奏しました。
C2 noun /sɒmˈnæmbjʊlɪst/

somnambulist

夢遊病者
Meaning
A person who sleepwalks.
Example
The somnambulist wandered out of the house at night.
夢遊病者は夜に家を出た。
A2 adjective /sɪksθ/

sixth

六番目
Meaning
coming after the fifth in order, position, or rank
Example
He finished the race in sixth place.
彼はレースで六番目に終わった。
C1 noun /ˈsɒl.ɪs/

Solace

慰め
Meaning
comfort or consolation in a time of distress or sadness
Example
She found solace in music after her loss.
彼女は失った後、音楽に慰めを見つけました。
B2 verb /stʌn/

stun

驚かす, 気絶させる
Meaning
to shock or surprise someone greatly; to knock someone unconscious or dazed
Example
The news of her sudden resignation stunned everyone.
彼女の突然の辞任のニュースは皆を驚かせた。
C2 noun /səˈnɛs.əns/

senescence

老化
Meaning
The process of growing old or the condition of aging.
Example
The biologist studied senescence in plants to understand aging.
生物学者は植物のセネセンスを研究して、老化を理解しようとしました。
B2 noun /sɛnˈseɪʃən/

Sensation

感覚 / センセーション
Meaning
a physical feeling or perception resulting from something that happens to or comes into contact with the body; a widespread reaction of interest and excitement
Example
The new singer became an overnight sensation.
新しい歌手は一夜にしてセンセーションとなった。
B2 noun /ˈspɛʃəlti/

specialty

専門
Meaning
a particular area of study, work, or interest; something in which a person or place excels
Example
Her specialty is pediatric medicine.
彼女の専門は小児科医学です。
B2 adjective /stɪf/

Stiff

硬直した; 固い; 堅固な
Meaning
not easily bent or changed; rigid; firm
Example
The old wooden board was too stiff to bend.
古い木の板は曲がりにくく、硬すぎた。
B2 verb /slæp/

slap

ビンタ
Meaning
to hit someone quickly with the flat part of the hand; to strike sharply
Example
She was so angry that she slapped him across the face.
彼女は怒りすぎて顔にビンタをした。
A1 modal verb /ʃʊd/

should

べき
Meaning
used to indicate obligation or duty
Example
You should study for your exams.
試験のために勉強すべきです。
C2 adjective /ˈsɪbɪlənt/

sibilant

シーシー音がする
Meaning
Making or characterized by a hissing sound.
Example
The word 'snake' starts with a sibilant sound.
'snake' という単語はシビラント音で始まります。
A2 noun /soʊp/

Soap

石鹸
Meaning
a cleaning agent made from fats or oils and used for washing
Example
Please wash your hands with soap and water.
石鹸と水で手を洗ってください。
B2 noun /ˈskændəl/

scandal

スキャンダル
Meaning
an event or action that causes public outrage or damage to one's reputation
Example
The politician's affair became a public scandal.
その政治家の不倫は公然のスキャンダルとなった。
B2 adjective /slɪm/

slim

スリム
Meaning
thin in an attractive or healthy way; small in amount or chance
Example
She looked slim in her new dress.
彼女は新しいドレスでスリムに見えた。
C1 adjective /ˈsaɪz.mɪk/

seismic

地震の
Meaning
Relating to earthquakes or vibrations of the earth and its crust.
Example
The region is known for its seismic activity.
その地域は地震活動で知られています。
B2 noun /ˈsɪmptəm/

symptom

症状
Meaning
a sign or indication of something, especially of an illness
Example
Fever is a common symptom of the flu.
熱はインフルエンザの一般的な症状です。
B2 adjective /skeərs/

Scarce

希少な; 見つけにくい; 少量で存在する
Meaning
rare; not easily found; existing in small quantities
Example
Fresh water is becoming increasingly scarce in desert regions.
砂漠地帯では、淡水がますます希少になっています。
B2 noun /ˈspɔːrtsmən/

sportsman

スポーツ選手
Meaning
A person who is skilled in sports or enjoys participating in athletic activities.
Example
He is a true sportsman, always fair and respectful to his opponents.
彼は本物のスポーツ選手で、常に相手に対して公正で尊敬を示す。
B2 adverb /ˈsʌbsɪkwəntli/

subsequently

その後
Meaning
at a later time; afterward
Example
He failed his exam and subsequently had to retake it.
彼は試験に失敗し、その後再試験を受けなければならなかった。
B2 verb /ˈspɛsɪfaɪ/

specify

指定する
Meaning
to state or describe something clearly and exactly
Example
Please specify the time and place of the meeting.
会議の時間と場所を指定してください。
C2 noun /səbˈmɜːrʒən/

submersion

沈没
Meaning
the state of being under water
Example
The submersion of the fields lasted for several days after the heavy rain.
激しい雨の後、畑の沈没は数日間続いた。
B2 adverb /ˈsɛkʃuəli/

sexually

性的に
Meaning
in a way that relates to or involves sexual activity or feelings
Example
The film was considered too sexually explicit for young audiences.
その映画は若い観客には過度に性的に露骨だと見なされました。
C2 adjective /ˈsɛrid/

serried

整列した
Meaning
pressed or crowded together, often in rows or ranks
Example
The soldiers stood in serried ranks, ready for inspection.
兵士たちは整列した行列で立って、点検の準備ができていました。
B2 verb /skrʌb/

scrub

こする
Meaning
To rub hard so as to clean, typically with a brush and water.
Example
Excessive scrubbing of the eyes is harmful.
目をこすることは過剰で有害です。
B2 adverb /ˈsɪmɪlərli/

similarly

同様に
Meaning
in a similar way
Example
Similarly, we can achieve success with dedication and hard work.
同様に、私たちは献身と努力によって成功を収めることができます。
C1 noun /siˈɛrə klʌb/

Sierra Club

シエラクラブ
Meaning
An American environmental organization founded in 1892 by John Muir, focused on promoting conservation of the natural environment by influencing public policy decisions.
Example
John Muir founded the Sierra Club in 1892 to protect wild areas.
ジョン・ミューアは1892年にシエラクラブを設立し、野生地帯を保護しました。
C2 adjective /ˈsloʊθfəl/

slothful

怠惰
Meaning
Lazy, idle, and unwilling to work.
Example
She was too slothful to get out of bed early.
彼女はベッドから早く起きるにはあまりにも怠惰でした。
C1 verb /skʌf/

scuff

擦り傷
Meaning
to mark or scratch the surface of something by rubbing
Example
He scuffed his shoes on the pavement.
彼は歩道で靴を擦り傷をつけた。
C1 adjective /sər'pæs.ɪŋ/

Surpassing

卓越; 優れた; 非常に優れた
Meaning
exceeding; going beyond; outstanding
Example
Her surpassing beauty made everyone stop and stare.
彼女の卓越した美しさは、誰もが立ち止まり、見入ってしまった。
C1 noun /ˈsɪk.əl/

Sickle

鎌
Meaning
a tool with a curved metal blade and short handle used for cutting grain crops
Example
The farmer harvested wheat using a traditional sickle.
農夫は伝統的な鎌を使って小麦を収穫しました。
C1 adjective /skəˈlæstɪk/

scholastic

学問的な
Meaning
Relating to schools, education, or academic learning.
Example
The school organizes scholastic competitions every year.
学校は毎年学問的な競技を開催します。
B2 noun /siːdʒ/

siege

包囲
Meaning
A military operation in which a place is surrounded to force its surrender.
Example
The castle fell after a long siege.
城は長い包囲戦の後に落ちました。
B1 noun, verb /stɒk/

stock

在庫
Meaning
a supply of goods kept for sale or use; to keep or fill with goods
Example
The shop stocks a wide variety of products.
その店はさまざまな製品を在庫しています。
C2 adjective /səˈleɪʃəs/

salacious

わいせつな
Meaning
Having or conveying undue or inappropriate sexual interest.
Example
The tabloid published a salacious story about the celebrity.
タブロイドはそのセレブに関するわいせつな話を公開した。
B2 adverb /ˈsɒftli/

softly

静かにまたは穏やかに
Meaning
in a gentle or quiet way.
Example
She spoke softly so as not to wake the baby.
赤ちゃんを起こさないように静かに話しました。
C1 noun /ˈsæf.aɪər/

Saphire

サファイア
Meaning
a precious stone that is typically blue in color
Example
The royal crown was adorned with a large sapphire.
ロイヤルクラウンは大きなサファイアで飾られていました。
C1 adjective ˈsɒvrɪn

sovereign

主権の, 最高の
Meaning
Possessing supreme or ultimate power; independent.
Example
The sovereign government has control over its currency.
主権政府は自国の通貨を管理している。
C2 adjective /ˌsæsərˈdoʊtl/

sacerdotal

神職に関する
Meaning
Relating to priests or the priesthood.
Example
The ritual had a distinctly sacerdotal character.
その儀式には明確な神職に関する特徴がありました。
A1 noun/adjective /saʊθ/

south

南
Meaning
the direction towards the bottom of a map, opposite to north
Example
The sun rises in the east and sets in the south.
太陽は東で昇り、南で沈みます。
B2 noun /ˌsuːpərˈvɪʒən/

supervision

監視
Meaning
the action or process of overseeing or managing something or someone
Example
The project was completed under the supervision of an experienced manager.
そのプロジェクトは経験豊富なマネージャーの監視の下で完了しました。
C1 adjective /sɑːrˈdɒnɪk/

sardonic

幸福
Meaning
Grimly mocking or cynical.
Example
She gave him a sardonic smile after hearing his excuse.
彼女は賞を受け取ったとき、自分の幸福を隠すことができませんでした。
C1 adjective /ˌsɛrənˈdɪpɪtəs/

serendipitous

偶然の幸運
Meaning
Occurring or discovered by chance in a happy or beneficial way.
Example
Their meeting at the café was purely serendipitous.
カフェでの彼らの出会いは完全に偶然の幸運でした。
A2 noun /skɪn/

Skin

肌
Meaning
the outer covering of the body; the natural outer covering of a fruit or vegetable
Example
Her skin was soft and smooth.
彼女の肌は柔らかくて滑らかでした。
C1 verb /skɔːrtʃ/

scorch

焦がす
Meaning
to burn the surface of something slightly
Example
The fire scorched the walls of the building.
火事が建物の壁を焦がした。
B1 noun /ˈsaɪdˌwɔːk/

sidewalk

歩道
Meaning
a paved path for pedestrians at the side of a street.
Example
Children were playing on the sidewalk.
子供たちは歩道で遊んでいました。
C2 noun ˈsaɪəns ˈdezət

science-desert

科学の砂漠
Meaning
A region or area lacking in scientific development, research facilities, or educational institutions.
Example
J.C. Bose thrived in a science-desert.
J.C. ボースは科学の砂漠で成功を収めました。
B2 noun səbˈstænʃəl ˈɪmpækt

substantial impact

重大な影響
Meaning
A significant, considerable, and meaningful effect or influence.
Example
Substantial impact is possible even with a few hours of volunteering.
少しの時間のボランティア活動でも重大な影響を与えることができます。
B2 adverb ˌsɪməlˈteɪnɪəsli

simultaneously

同時に
Meaning
At the same time; occurring or existing at the same time.
Example
He worked on two projects simultaneously.
彼は二つのプロジェクトを同時に進めていました。
A2 noun /stʌf/

stuff

物
Meaning
a collection of things or materials, typically unspecified or uncountable
Example
She packed all her stuff into the suitcase.
彼女はすべての物をスーツケースに詰め込んだ。
B2 adjective /ˈspaɪ.rəl/

Spiral

螺旋
Meaning
winding in a continuous curve; helical
Example
The spiral staircase led to the top floor.
螺旋階段は最上階に通じていました。
B2 noun /stɑːr fɪʃ/

Star fish

ヒトデ
Meaning
a marine echinoderm with five or more radiating arms, typically found on the sea floor
Example
The starfish slowly moved across the ocean floor searching for food.
ヒトデはゆっくりと海底を動きながら食べ物を探した。
C2 noun /ˈsʌplɪkənt/

supplicant

請願者
Meaning
A person who humbly or earnestly asks for something, usually from a person of authority.
Example
The temple was filled with supplicants seeking blessings.
寺院には祝福を求める請願者で溢れていました。
B1 verb /səˈspɛkt/

suspect

疑う
Meaning
to believe that someone has done something wrong; to doubt or mistrust
Example
I suspect he is lying about his whereabouts.
彼が居場所について嘘をついていると思います。
C2 noun /sɜːrˈsiːs/

surcease

停止
Meaning
a temporary or final ending or stopping of something
Example
The noise finally came to a surcease after midnight.
騒音は真夜中を過ぎて最終的に停止しました。
A2 adjective /skɛrd/

scared

怖がっている
Meaning
feeling afraid or worried
Example
She was scared of the dark.
彼女は暗闇を怖がっていた。
B2 noun /streɪn/

Strain

緊張; 圧力; 疲労;
Meaning
pressure or tension; excessive demand on strength or resources
Example
Working long hours put a strain on his health.
長時間働くことは彼の健康に圧力をかけました。
C1 adjective /ˈspeɪʃəl/

spatial

空間の
Meaning
relating to space or the position, area, and size of things
Example
The scientist studied the spatial arrangement of stars.
科学者は星の空間配置を研究しました。
B2 noun /skɑːr/

Scar

傷跡
Meaning
a mark left on the skin after a wound has healed; lasting emotional damage
Example
The accident left a permanent scar on his forehead.
その事故は彼の額に永遠の傷跡を残しました。
B2 noun /skoʊp/

scope

範囲
Meaning
the range of one's perception, understanding, or activity
Example
The project is beyond the scope of our resources.
そのプロジェクトは私たちのリソースの範囲を超えています。
C2 noun /ˌself əˈbeɪs.mənt/

self-abasement

自己卑下
Meaning
The act of belittling or humiliating oneself.
Example
His constant self-abasement made others uncomfortable.
彼の絶え間ない自己卑下は他の人々を不快にさせた。
A2 adjective /ˈsɛvrəl/

several

いくつか
Meaning
more than one but not many; a few
Example
Several people attended the meeting yesterday.
数人が昨日の会議に出席した。
C1 noun, verb /spreɪn/

sprain

捻挫
Meaning
an injury to a joint in which the ligaments are stretched or torn
Example
She sprained her ankle while running in the park.
公園で走っているときに足首をねんざした。
C1 noun /ˈsəʊdiəm/

sodium

ナトリウム
Meaning
a soft, silver-white chemical element that is highly reactive and found in salt.
Example
Sodium is an essential element for maintaining fluid balance in the body.
ナトリウムは体内の液体バランスを維持するために不可欠な元素です。
C1 noun/verb /snɛər/

snare

罠
Meaning
a trap for catching animals; to catch or trap
Example
The hunter set a snare to catch rabbits.
ハンターはウサギを捕まえるために罠を仕掛けました。
C2 noun /spliːn/

spleen

脾臓; 怒り
Meaning
an organ in the body that produces lymphocytes and filters blood; also refers to bad temper or spite
Example
He vented his spleen on his coworkers after the meeting.
会議後、彼は同僚に対して怒りをぶつけました。
C1 noun /sɪv/

sieve

ふるい
Meaning
a utensil with a mesh or perforated bottom, used for straining or sifting
Example
She used a sieve to strain the pasta.
彼女はパスタをこすためにふるいを使いました。
A1 verb /ˈstʌdi/

study

勉強する
Meaning
to learn about something; to examine carefully; to research
Example
I study mathematics every evening.
私は毎晩数学を勉強します。
C1 adjective /ˈskræpi/

scrappy

戦闘的 / 散らかった
Meaning
Determined and willing to fight or argue; also messy or disorganized.
Example
Despite being small, he was a scrappy fighter.
小さくても、彼は戦闘的な戦士でした。
C1 adjective /ˈstæɡ.nənt/

Stagnant

停滞した; 動かない; 発展していない
Meaning
not moving or flowing; showing no activity or development
Example
The stagnant water in the pond was covered with algae.
池の中の停滞した水は藻で覆われていました。
C2 verb /ˈskærɪfaɪ/

scarify

土を耕す
Meaning
to make shallow cuts or scratches; to loosen the surface of soil
Example
The farmer scarified the soil before planting seeds.
農家は種を植える前に土をスカリファイしました。
B1 noun/verb /skɔːr/

score

スコア
Meaning
a number of points achieved in a game or test; to gain points or achieve a goal
Example
He scored the winning goal in the final match.
彼は最後の試合で決勝ゴールを決めました。
C2 adjective /ˈsæpɪd/

sapid

美味しい
Meaning
Having a pleasant taste; flavorful.
Example
The chef prepared a sapid dish that delighted everyone at the table.
シェフはテーブルの全員を喜ばせる美味しい料理を準備しました。
C2 noun /ˈsɜːfdəm/

serfdom

農奴制
Meaning
The status or condition of being a serf, bound to work for a lord.
Example
Many peasants in medieval Europe lived under serfdom.
中世ヨーロッパの多くの農民は農奴制の下で生活していた。
B2 adjective /ˌsuː.pəˈfɪʃ.əl/

superficial

表面的
Meaning
Existing or occurring at or on the surface; not thorough or deep.
Example
His understanding of the subject was rather superficial.
彼のそのテーマに対する理解はかなり表面的でした。
A2 noun /ʃer/

Share

部分
Meaning
a portion of something; a part or portion of a larger amount
Example
Each partner received an equal share of the company profits.
各パートナーは会社の利益の平等な部分を受け取りました。
C1 noun ˈsʌb.tɛkst

subtext

サブテキスト
Meaning
Hidden meaning or message behind spoken or written words
Example
The subtext of his speech suggested disagreement.
彼のスピーチのサブテキストは、意見の不一致を示唆していた。
C1 verb /sərˈpæs/

surpass

超える
Meaning
to exceed or go beyond
Example
Her performance surpassed all expectations.
彼女のパフォーマンスはすべての期待を上回った。
C1 verb /ˈskwɒndər/

squander

浪費する
Meaning
to waste money, time, or opportunities in a careless way
Example
He squandered his inheritance on gambling.
彼はギャンブルに遺産を浪費した。
B2 adjective /ˈstʌf.i/

Stuffy

新鮮な空気が不足している; 通気性が悪い; 形式的で保守的な態度
Meaning
lacking fresh air; poorly ventilated; formal and conservative in attitude
Example
The room was stuffy and needed fresh air.
部屋はこもっていて、新鮮な空気が必要でした。
C2 adjective /sɛpˈtɛnɪəl/

septennial

7年ごとの
Meaning
Occurring every seven years.
Example
The festival is a septennial tradition in the village.
その祭りは村で7年ごとの伝統です。
B1 adverb /ˈspeʃ.əl.i/

Specially

特別に
Meaning
for a particular purpose; especially; specifically
Example
This gift was specially made for you.
このギフトは特別にあなたのために作られました。
C1 noun /sɔɪl ˈmæn.ɪdʒ.mənt/

soil management

土壌管理
Meaning
The application of operations, practices, and treatments to protect soil and enhance its performance.
Example
Proper soil management improves long-term agricultural productivity.
適切な土壌管理は、長期的な農業生産性を向上させます。
B2 noun /stəˈbɪl.ə.ti/

Stability

安定性
Meaning
the state of being stable; firmness; steadiness
Example
Political stability is essential for economic growth.
政治的安定は経済成長にとって重要です。
C1 adjective /ˈstɔːlwərt/

stalwart

忠実, 頑強
Meaning
Loyal, reliable, and hardworking; strongly built or sturdy.
Example
She has always been a stalwart supporter of the community.
彼女は常にコミュニティの忠実な支持者でした。
B2 phrase ˈsɛvən ˈhæbɪts

seven habits

七つの習慣
Meaning
Regular behaviors or actions that are done consistently over time, specifically referring to a set of seven key practices.
Example
Even habits help in maintaining a balanced lifestyle.
習慣はバランスの取れたライフスタイルを維持するのに役立ちます。
C1 adjective /ˈswɛltərɪŋ/

sweltering

うだるような暑さ
Meaning
uncomfortably hot
Example
The sweltering heat made it hard to work.
うだるような暑さで仕事が難しくなった。
C2 adjective /ˈsɪŋkəˌpeɪtɪd/

syncopated

シンコペイテッド
Meaning
Characterized by displaced beats or rhythms, especially in music.
Example
The jazz piece had a syncopated rhythm that energized the crowd.
ジャズの曲には、群衆を元気づけたシンコペイテッドのリズムがありました。
C1 verb /siːp/

seep

しみ出す
Meaning
to flow or leak slowly through small openings or pores
Example
Water began to seep through the cracks in the wall.
水が壁のひび割れからしみ出し始めました。
A2 adverb /ˈsɪə.ri.əs.li/

seriously

真剣に
Meaning
in a solemn or thoughtful manner
Example
She took the matter very seriously.
彼女はその問題を非常に真剣に取り扱った。
C1 adjective /suːˈpɜːrlətɪv/

superlative

最上級
Meaning
Of the highest quality or degree; expressing the extreme form of an adjective or adverb.
Example
Her performance was superlative, earning her a standing ovation.
彼女のパフォーマンスは最上級で、スタンディングオベーションを受けました。
B2 noun /ˈsɜːvɪŋ/

serving

ポーション
Meaning
a portion of food for one person; the act of giving food or drink to someone
Example
He ate a large serving of rice and curry.
彼は大きなポーションのご飯とカレーを食べました。
C1 verb /skɪmp/

skimp

ケチる
Meaning
to use less of something than is necessary in order to save money or effort
Example
Don’t skimp on quality when buying a new laptop.
新しいノートパソコンを買うときは、品質をケチらないでください。
C2 verb /swɪl/

swill

がぶがぶ飲む
Meaning
to drink something greedily or in large amounts
Example
He swilled down the beer in seconds.
彼は数秒でビールを飲み干した。
B2 adjective strəˈtiː.dʒɪk

strategic

戦略的
Meaning
Relating to the identification of long-term or overall aims and interests and the means of achieving them.
Example
Strategic policies enhance competitiveness.
戦略的な政策は競争力を高めます。
C1 verb, adjective, noun /spruːs/

spruce

整える / 一種の木
Meaning
to make neat or tidy in appearance; also refers to an evergreen tree
Example
He spruced up his room before the guests arrived.
彼はゲストが到着する前に部屋を整えました。
B1 noun səˈplaɪ

supply

供給。サプライ。
Meaning
A stock or amount of something supplied or available for use.
Example
Supply chains ensure resource availability.
サプライチェーンは資源の利用可能性を確保します。
A2 noun /stoʊn/

stone

石
Meaning
a hard, naturally occurring mineral material found in the earth
Example
He threw a stone into the lake.
彼は湖に石を投げました。
B1 noun /ˈsiː.hɔːrs/

Sea-horse

タツノオトシゴ
Meaning
a small marine fish with segmented bony armor, an upright posture, and a curled prehensile tail
Example
The seahorse gracefully floated among the coral reefs.
タツノオトシゴはサンゴ礁の中を優雅に浮かんでいました。
B2 noun /ˈspəʊksmən/

spokesman

スポークスマン
Meaning
a person who speaks on behalf of others, especially for a group or organization
Example
The spokesman addressed the crowd during the rally.
スポークスマンは集会中に群衆に向かって話した。
C2 noun /sɪlf/

sylph

シルフィード
Meaning
A mythical spirit of the air; also refers to a slender, graceful woman.
Example
She moved across the stage like a sylph, light and graceful.
彼女は舞台上をシルフィードのように軽やかで優雅に動いていました。
B2 noun /spɑːrk/

Spark

火花
Meaning
a small fiery particle thrown off from a fire; a flash of light; something that triggers or initiates
Example
A spark from the campfire ignited the dry leaves.
キャンプファイヤーからの火花が乾いた葉を点火しました。
A2 noun /seɪf/

Safe

金庫; 保護
Meaning
secure container for storing valuables; protection from danger
Example
He kept his important documents in the office safe.
彼は重要な書類をオフィスの金庫に保管していました。
C1 adjective /ˈsɪn.tɪ.leɪ.tɪŋ/

scintillating

きらめく
Meaning
brilliantly clever, exciting, or sparkling
Example
Her scintillating conversation kept everyone entertained.
彼女のきらめく会話は皆を楽しませた。
C1 adjective /ˌsɛm.iˈæn.ju.əl/

semiannual

半年ごと
Meaning
Occurring twice a year; every six months.
Example
The company holds a semiannual meeting with all employees.
会社は6ヶ月ごとに全社員との会議を開きます。
B2 noun /ˌsɒl.ɪˈdær.ə.ti/

Solidarity

団結
Meaning
unity or agreement of feeling or action among individuals with a common interest
Example
The workers showed solidarity during the strike.
労働者はストライキの間、団結を示しました。
B2 adverb /ˈsmɑːt.li/

Smartly

賢く; スタイリッシュに; 速く
Meaning
in a clever or intelligent way; neatly and stylishly; quickly
Example
He was smartly dressed for the business meeting.
彼はビジネスミーティングのためにスマートに服を着ていました。
C1 noun স্ক্রোলিং অ্যাডিকশন

scrolling addiction

スクロール依存症
Meaning
A compulsive need to continuously scroll through content on digital devices, particularly smartphones and social media platforms.
Example
Scrolling addiction is a growing concern among smartphone users.
スクロール依存症はスマートフォンユーザーの間で増加している懸念事項です。
C1 verb /ˈsætʃəˌreɪt/

saturate

Meaning
to fill completely with something until no more can be absorbed
Example
The heavy rain saturated the ground within minutes.
C2 noun /ˈsfɛrɔɪd/

spheroid

回転楕円体
Meaning
A three-dimensional shape that is almost spherical but slightly flattened or elongated.
Example
The Earth is not a perfect sphere but an oblate spheroid.
地球は完璧な球体ではなく、偏平な回転楕円体です。
C1 noun speɪst ˌrep.ɪˈtɪʃ.ən

spaced repetition

間隔反復
Meaning
A learning technique that involves reviewing information at increasing intervals to improve long-term retention.
Example
Spaced repetition helps in long-term memory retention.
スペースド・リピティションは長期記憶を保持するのに役立ちます。
C2 adjective /sɛnˈtɛnʃəs/

sententious

道徳的な; 道徳的に説教する
Meaning
Given to moralizing in a pompous or affected manner.
Example
His sententious remarks annoyed the audience.
彼の道徳的なコメントは観客をイライラさせた。
C1 noun /ˈsɪmətri/

symmetry

対称
Meaning
the quality of having balanced proportions or identical parts facing each other
Example
The building’s symmetry impressed the visitors.
建物の対称性は訪問者に感銘を与えました。