sophistry
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C2 noun /ˈsɒfɪstri/

sophistry

詭弁
Meaning
the use of clever but false arguments, often to deceive
Example
The politician's speech was full of sophistry.
その政治家の演説は詭弁に満ちていた。
C2 noun (plural, informal) /skædz/

scads

たくさん
Meaning
A large number or quantity of something (informal).
Example
She has scads of friends in the city.
彼女は街にたくさんの友達がいます。
C2 noun /ˈsteɪsɪs/ or /ˈstæsɪs/

stasis

停滞
Meaning
A state of inactivity or equilibrium; a situation where nothing changes.
Example
The negotiations reached a state of stasis with no progress made.
交渉は停滞状態に達し、進展はありませんでした。
C2 noun /ˌsɪmjʊˈleɪkrəm/

simulacrum

シミュラクル
Meaning
an image or representation of someone or something; a superficial likeness
Example
The statue was only a simulacrum of the ancient god.
その像は古代の神のシミュラクルに過ぎなかった。
C2 verb /səbˈsjuːm/

subsume

含む
Meaning
To include or absorb something into a larger group or category.
Example
Minor details were subsumed under the main topic.
マイナーな詳細は主要なトピックに含まれました。
C2 adjective /ˈʃɑːpwɔːrn/

shopworn

古くなった / 色あせた
Meaning
worn or faded from being displayed in a shop; no longer fresh or original
Example
The shopworn shoes were sold at a discount.
ショッピングワーンの靴は割引価格で販売されました。
C2 noun /ˈsælvər/

salver

銀のトレイ
Meaning
A tray, typically made of silver, used for serving food or drinks.
Example
The butler brought in the tea on a silver salver.
執事は銀のトレイでお茶を運んできました。
C2 adjective /sɪˈnɒptɪk/

synoptic

総括的
Meaning
giving a general overview or summary; presenting a broad view
Example
The report offers a synoptic view of climate trends over the past century.
報告書は過去の世紀の気候の傾向について総括的な視点を提供しています。
C2 adjective /ˈsiːkwənt/

sequent

次の
Meaning
Following in order or as a result.
Example
The sequent events changed the course of history.
次の出来事は歴史の流れを変えました。
C2 adjective sɑːˈtɔːrɪəl

sartorial

衣服やスタイルに関連する
Meaning
Of or relating to clothing or style or manner of dress.
Example
His sartorial choices were always on trend and admired.
彼のサートリアルな選択はいつも流行に合っていて、賞賛されていました。
C2 noun /ˈskɔːrpiən fɪʃ/

Scorpion fish

オニカサゴ
Meaning
a type of fish with venomous spines that belongs to the family Scorpaenidae
Example
The scorpion fish has dangerous spines that can inject venom.
オニカサゴは毒を注入できる危険な棘を持っています。
C2 noun /ˈseɪnjər/

seignior

封建領主
Meaning
A feudal lord; a man of authority in medieval Europe.
Example
The seignior demanded taxes from the peasants.
封建領主は農民から税金を要求した。
C2 verb /seɪt/

sate

満たす
Meaning
To satisfy fully or to excess.
Example
The huge meal sated their hunger after the long journey.
長い旅の後、巨大な食事が彼らの空腹を満たした。
C2 noun /ˈsiːkənt/

secant

割線
Meaning
A straight line that intersects a curve at two or more points.
Example
In geometry, a secant cuts the circle at two distinct points.
幾何学では、割線は円を二つの異なる点で交差します。
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。
C2 noun /sɑːrˈkɒfəɡəs/

sarcophagus

石棺
Meaning
A stone coffin, often decorated, used in ancient times.
Example
The museum displayed a beautifully carved sarcophagus from ancient Egypt.
博物館には古代エジプトからの美しく彫刻された石棺が展示されていました。
C2 adjective /ˌsʌb.əˈkwɒt.ɪk/

subaquatic

水中
Meaning
Existing, living, or located under water.
Example
Divers explored the subaquatic cave system filled with rare fish.
ダイバーたちは珍しい魚でいっぱいの水中洞窟システムを探査しました。
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。
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。
C2 noun /stɛp/

steppe

ステップ
Meaning
A large flat area of unforested grassland, especially in southeastern Europe or Siberia.
Example
The nomads traveled across the vast steppe with their herds.
遊牧民は自分の家畜を連れて広大なステップを渡っていた。
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。
C2 noun /ˈspɛndˌθrɪft/

spendthrift

浪費家
Meaning
A person who spends money extravagantly or wastefully.
Example
The young prince was known as a spendthrift, wasting his fortune on lavish parties.
若い王子は浪費家として知られ、贅沢なパーティーに財産を浪費していた。
C2 verb /stɑːntʃ/

stanch

止血する
Meaning
to stop the flow of blood or liquid from a wound or source
Example
The nurse quickly stanched the bleeding from the cut.
看護師はすぐに切り傷からの出血を止めました。
C2 verb /səˈbɔːrn/

suborn

買収する
Meaning
to bribe or induce someone unlawfully to perform an act, especially to commit perjury
Example
The lawyer was accused of trying to suborn a witness.
弁護士は証人を買収しようとしたと非難された。
C2 adjective /ˈsʌpliənt/

suppliant

請願者
Meaning
Humbly or earnestly asking for something, especially from a person in authority.
Example
The suppliant man begged for mercy at the king's feet.
請願者は王の足元で慈悲を乞いました。
C2 adjective /səˈdʒɛstəbəl/

suggestible

影響されやすい
Meaning
easily influenced by the suggestions of others
Example
Children are highly suggestible and may believe what they are told.
子供たちは非常に影響されやすく、言われたことを信じるかもしれません。
C2 noun /ˈsɪkəfənt/

sycophant

お世辞使い
Meaning
A person who acts obsequiously toward someone important in order to gain advantage.
Example
The manager was surrounded by sycophants who agreed with everything he said.
マネージャーは、彼が言ったことすべてに同意するお世辞を言う人々に囲まれていました。
C2 noun /ˈspɒt.ɪd sneɪk hed/

Spotted snake head

カムルチー
Meaning
a type of freshwater fish with spotted markings and an elongated head resembling a snake
Example
The spotted snake head is a popular fish for aquaculture in South Asia.
カムルチーは南アジアで人気のある養殖魚です。
C2 noun /səbˈdʌk.ʃən/

subduction

地殻の一層が別の層の下に移動すること。
Meaning
The lateral and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
Example
The Pacific Ring of Fire is an area of intense subduction.
太平洋の火の輪は激しいサブダクションの領域です。
C2 noun /ˈsɛkstənt/

sextant

セクスタント
Meaning
a navigational instrument with a graduated arc of 60°, used to measure the angle between a celestial object and the horizon
Example
Using a sextant, the navigator fixed the ship’s position at noon.
セクスタントを使用して、ナビゲーターは正午に船の位置を特定しました。
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。
C2 verb /slʌf/ or /sluː/

slough

皮を捨てる / 湿地
Meaning
To shed or cast off (like dead skin); also a swampy or muddy area.
Example
The snake sloughed off its old skin.
ヘビは古い皮を捨てた。
C2 adjective /ˌsuː.pər.ɪˈrɑː.ɡə.tɔːr.i/

supererogatory

過剰
Meaning
Going beyond what is required or expected; more than necessary.
Example
His donation was supererogatory, far beyond what anyone had asked for.
彼の寄付は過剰で、誰もが求めていた以上のものでした。
C2 noun/verb /sluːs/

sluice

水門 / 洗う
Meaning
A sliding gate for controlling the flow of water; to wash or rinse with water in large quantities.
Example
The workers sluiced the mud off the street after the heavy rain.
作業員は大雨の後に通りから泥を洗い流しました。
C2 verb, adjective /ˈstraɪeɪt/

striate

縞模様にする
Meaning
to mark with stripes or grooves; striped or streaked in appearance
Example
The rock surface was striated by glacial movement.
氷河の動きによって岩石の表面に縞模様ができました。
C2 noun /ˈʃɑːdənfrɔɪdə/

schadenfreude

他人の不幸を喜ぶこと
Meaning
pleasure derived from another person's misfortune
Example
He felt a sense of schadenfreude when his rival failed.
ライバルが失敗したとき、彼はシャーデンフロイデを感じた。
C2 noun /sfɛˈrɪsɪti/

sphericity

球形
Meaning
The quality or state of being spherical; roundness.
Example
The sphericity of the ball made it roll smoothly on the ground.
ボールの球形は、地面でスムーズに転がるのを可能にしました。
C2 noun /ˈskɜː.vi/

scurvy

壊血病
Meaning
A disease caused by a deficiency of vitamin C, leading to weakness, gum disease, and bleeding.
Example
Sailors often suffered from scurvy during long sea voyages without fresh fruits.
水夫たちは、新鮮な果物がない長い海の航海中によく壊血病にかかっていました。
C2 noun /ˈsteɪtkraft/

statecraft

国政術
Meaning
The art of governing and managing state affairs effectively.
Example
The leader was praised for his exceptional statecraft in handling international relations.
リーダーは国際関係を扱う際の卓越した国政術に対して称賛されました。
C2 verb /ˈsɛreɪt/

serrate

ギザギザの縁を作る
Meaning
To make a saw-toothed edge or notched margin.
Example
The craftsman serrated the knife blade for better cutting.
職人はより良い切断のためにナイフの刃をセレイトしました。
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。
C2 verb /sʌbˈtɛnd/

subtend

角度を作る
Meaning
To extend across or form an angle at a particular point, often used in geometry.
Example
The arc subtends a 60-degree angle at the center of the circle.
アークは円の中心で60度の角度を作ります。
C2 noun /sɒp/

sop

Meaning
a concession or appeasement to pacify someone; also a piece of bread dipped in liquid
Example
The manager offered a bonus as a sop to the unhappy employees.
C2 noun/verb /ˈsʌkər/

succor

援助
Meaning
Assistance and support in times of hardship or distress.
Example
The charity provided succor to the flood victims.
慈善団体は洪水の被害者に援助を提供しました。
C2 noun /ʃiːt fɪʃ/

Sheat-fish

ナマズ
Meaning
A large freshwater catfish with a broad flat head and long barbels
Example
The sheat-fish is one of the largest freshwater fish in South Asia.
ナマズは南アジアで最大の淡水魚の一つです。
C2 adjective /spɪk/

Spick

非常にきれいで整頓された; 完璧
Meaning
extremely clean and neat; immaculate
Example
The house was spick and span after the cleaning.
掃除後、家はまるで新品のようにきれいで整然としていました。
C2 adjective /saɪˈdɪəriəl/

sidereal

恒星の
Meaning
Relating to the stars or constellations; measured relative to the stars.
Example
Astronomers use sidereal time to track the positions of stars.
天文学者は恒星時を使用して星の位置を追跡します。
C2 adjective /sɪˈbeɪʃəs/

sebaceous

皮脂に関連する
Meaning
Relating to or secreting sebum, an oily substance from the skin.
Example
Acne is often caused by overactive sebaceous glands.
ニキビは、過剰に活発な皮脂腺によって引き起こされることがよくあります。
C2 noun /ˈsɒfɪst/

sophist

詭弁家
Meaning
a person who uses clever but misleading arguments
Example
He was dismissed as a sophist who twisted facts to win debates.
彼は討論に勝つために事実を歪める詭弁家として解雇されました。
C2 noun /ˈsaɪz.mə.ɡræf/

seismograph

地震計
Meaning
An instrument that measures and records details of earthquakes, such as force and duration.
Example
The seismograph detected a strong tremor in the area.
地震計はその地域で強い揺れを検出しました。
C2 verb /ˈsʌbdʒʊˌɡeɪt/

subjugate

支配する
Meaning
To bring under domination or control, especially by conquest.
Example
The empire sought to subjugate the neighboring kingdoms.
帝国は隣接する王国を従わせようとした。
C2 noun /ˌsæv.wɑːr ˈfeər/

savoir-faire

社交術
Meaning
The ability to act or speak appropriately in social situations; polished social skills.
Example
She handled the delicate situation with remarkable savoir-faire.
彼女は見事な社交術で微妙な状況をうまく処理しました。
C2 adjective /sɪˈnæp.tɪk/

synaptic

シナプスの
Meaning
Related to the signal transmission process between nerve cells.
Example
Learning strengthens synaptic connections in the brain.
学習は脳内のシナプス接続を強化する。
C2 adjective, adverb /ˈsaɪdlɔːŋ/

sidelong

斜め目線
Meaning
Directed to the side; indirect, furtive, or not straightforward.
Example
She gave him a sidelong glance across the room.
彼女は部屋を横切って彼に斜め目線を送った。
C2 adjective /ˈsfɪŋks laɪk/

sphinx-like

神秘的な
Meaning
Mysterious, enigmatic, or difficult to interpret
Example
Her sphinx-like smile made it hard to guess what she was thinking.
彼女のスフィンクスのような微笑みは、彼女が何を考えているのかを予測するのを難しくさせた。
C2 adjective /səˈluːtəˌtɔri/

salutatory

歓迎の挨拶
Meaning
Relating to or expressing a greeting or an address, especially at the beginning of a speech.
Example
She delivered a salutatory address at the graduation ceremony.
彼女は卒業式で歓迎の挨拶を行いました。
C2 noun /skɪf/

skiff

小舟
Meaning
a small, light boat usually for one person
Example
The fisherman paddled his skiff across the lake.
漁師は彼の小舟で湖を渡った。
C2 adjective /sʌbˈlɪŋɡwəl/

sublingual

舌下
Meaning
situated or applied under the tongue
Example
The doctor prescribed a sublingual tablet for faster absorption.
医師は吸収を早めるために舌下錠を処方しました。
C2 adjective /səˈræfɪk/

seraphic

天使のような
Meaning
Of or like a seraph; angelic, pure, and blissful.
Example
She gave him a seraphic smile that calmed his fears.
彼女は彼に天使のような微笑みをくれて、彼の恐れを和らげた。
C2 verb /ˈsʌblɪmeɪt/

sublimate

より高い活動に変換する
Meaning
to redirect strong emotions or desires into socially acceptable activities or channels
Example
She sublimated her anger into painting beautiful landscapes.
彼女は美しい風景を描くことで怒りをサブリメートしました。
C2 adjective /ˈsuːpaɪn/

supine

仰向けで横たわる
Meaning
Lying on the back, face upward; failing to act due to laziness or weakness.
Example
He lay supine on the grass, staring at the stars.
彼は草の上に仰向けで横たわり、星を見ていた。
C2 noun /ˈslʌɡərd/

sluggard

怠け者
Meaning
A lazy, sluggish person.
Example
The sluggard refused to get out of bed even at noon.
怠け者は正午でもベッドから起きることを拒否しました。
C2 noun /ˌsuː.pɚˈfluː.ə.t̬i/

superfluity

過剰
Meaning
An excessive amount of something; more than what is needed.
Example
The room was filled with a superfluity of decorations.
部屋は装飾で過剰に満たされていました。
C2 noun /slaɪt/

sleight

手品
Meaning
Skill or dexterity, especially in performing tricks.
Example
The magician amazed the crowd with his sleight of hand.
マジシャンはその手品で観客を驚かせた。
C2 noun /sɪˈkwiːlə/

sequela

後遺症
Meaning
A condition that is the consequence of a previous disease or injury.
Example
Lung scarring can be a sequela of severe pneumonia.
肺の瘢痕は重度の肺炎の後遺症である可能性があります。
C2 noun/verb /ˈsoʊdʒɜrn/

sojourn

一時的な滞在
Meaning
A temporary stay at a place; to stay temporarily
Example
She enjoyed a brief sojourn in Paris during the summer.
彼女は夏の間、パリで短期間の滞在を楽しんだ。
C2 noun /ˌsɪnjuˈɒsɪti/

sinuosity

曲がり具合
Meaning
The quality or state of being winding, curving, or having many turns.
Example
The sinuosity of the river made navigation challenging.
川の曲がり具合はナビゲーションを難しくした。
C2 adjective /ˈspaɪnəs/

spinous

棘のある
Meaning
Having spines or thorn-like projections
Example
The spinous cactus was difficult to handle without gloves.
その棘のあるサボテンは手袋なしでは取り扱いにくかった。
C2 adjective /suːˈpɜːrnəl/

supernal

天上的
Meaning
Relating to the heavens; celestial or divine.
Example
The painting captured a supernal beauty that felt otherworldly.
その絵は、まるで別の世界から来たような天上的な美しさを捉えました。
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。
C2 adjective /sɒmˈnɪfərəs/

somniferous

眠気を引き起こす
Meaning
Tending to induce sleep; soporific.
Example
The professor's somniferous lecture put half the class to sleep.
教授のソムニフェラスな講義はクラスの半分を眠らせた。
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。
C2 adjective /ˌsɒfəˈmɒrɪk/

sophomoric

未熟
Meaning
showing immaturity and overconfidence, like a sophomore
Example
His sophomoric behavior embarrassed his friends.
彼の未熟な行動は友人たちを恥ずかしい思いにさせた。
C2 noun /ˌspoʊliˈeɪʃən/

spoliation

破壊
Meaning
The act of destroying or ruining something, often evidence or property.
Example
The court punished the company for the spoliation of evidence.
裁判所は証拠の破壊のために会社を罰しました。
C2 noun /spʌndʒ ɡɔːrd/

Sponse gourd

スポンジカボチャ
Meaning
a fibrous gourd that becomes sponge-like when dried, used for cleaning and in cooking when young
Example
The sponge gourd can be eaten when young or dried to make natural scrubbers.
スポンジカボチャは若い時に食べることができるか、乾燥させて自然のスポンジを作ることができます。
C2 noun /ˌsɪŋ.krəˈnɪs.ɪ.ti/

synchronicity

シンクロニシティ
Meaning
The meaningful coincidence of two or more events that are not planned.
Example
The synchronicity of their thoughts amazed everyone.
彼らの思考のシンクロニシティは皆を驚かせました。
C2 adjective /ˈsɪnjuːi/

sinewy

筋肉質で強い
Meaning
Lean and muscular; strong and tough.
Example
The athlete had a sinewy build that showed his strength.
そのアスリートは筋肉質な体型をしており、力強さを示していた。
C2 noun /spjuːm/

spume

泡
Meaning
Froth or foam, especially found on waves or liquids.
Example
The waves crashed against the rocks, leaving spume in the air.
波が岩にぶつかり、空気中に泡を残した。
C2 verb /ˈsʌk.əl/

suckle

授乳する
Meaning
to feed a baby or young animal with milk from the breast or udder
Example
The mother cat suckled her kittens in the basket.
母猫はバスケットで子猫にお乳を与えていました。
C2 noun /ˈsɜːrfɪt/

surfeit

過剰
Meaning
an excessive amount of something
Example
There was a surfeit of food at the festival.
祭りでは食べ物が過剰にあった。
C2 noun /ˌʃæŋɡriˈlɑː/

shangri-la

架空の楽園
Meaning
a remote, beautiful, imaginary place where life is perfect and peaceful
Example
They described the island as a modern-day Shangri-La.
彼らはその島を現代版シャングリ・ラとして描写しました。
C2 noun /ˌsɪɡnɪfɪˈkeɪʃən/

signification

意味
Meaning
the meaning or sense conveyed by a word, action, or symbol
Example
The signification of the gesture was misunderstood.
そのジェスチャーの意味は誤解されていました。
C2 adjective /svelt/

svelte

スリム
Meaning
Attractively thin, graceful, and elegant in appearance or movement.
Example
She looked svelte in the elegant black dress.
彼女はエレガントな黒いドレスを着てスリムに見えた。
C2 verb /ʃʌk/

shuck

殻を剥く
Meaning
To remove the outer covering, such as the husk of corn or shell of shellfish.
Example
She learned how to shuck oysters quickly.
彼女は牡蠣の殻を素早く剥く方法を学びました。
C2 noun /ˈʃaɪstər/

shyster

詐欺師
Meaning
a person, especially a lawyer, who uses unscrupulous or dishonest methods
Example
The businessman was exposed as a shyster who cheated clients.
そのビジネスマンは、顧客を騙す詐欺師として暴露されました。
C2 adjective /ˈsɒmnələnt/

somnolent

眠気を催す
Meaning
Sleepy or drowsy; causing a desire to sleep.
Example
The somnolent lecture made half the class fall asleep.
その眠気を催す講義は、クラスの半分を寝かせてしまった。
C2 adjective /ˈswɔːrði/

swarthy

日焼けした
Meaning
Having a dark complexion or skin tone.
Example
The sailor had a swarthy face from years under the sun.
その水夫は、何年も太陽の下で働いたため、日焼けした顔をしていた。
C2 noun /ˈsɒlɪˌsɪzəm/

solecism

文法ミス
Meaning
a grammatical mistake in speech or writing; a breach of good manners or etiquette
Example
His speech was full of solecisms and awkward phrases.
彼のスピーチは文法ミスと不器用なフレーズでいっぱいだった。
C2 adjective /ˈstɪdʒiən/

stygian

暗黒
Meaning
extremely dark, gloomy, or forbidding
Example
They walked through the stygian cave with torches.
彼らは松明を持って暗黒の洞窟を歩いていました。
C2 adjective /sʌbˈdʒeɪsənt/

subjacent

下層の
Meaning
lying immediately beneath; underlying
Example
The geological survey revealed subjacent layers of rock.
地質調査は下層の岩層を明らかにした。
C2 adjective /ˈsæŋɡwɪˌnɛri/

sanguinary

血なまぐさい
Meaning
Involving or causing much bloodshed; bloodthirsty.
Example
The battle was one of the most sanguinary conflicts of the war.
その戦闘は戦争の中で最も血なまぐさい戦いの一つだった。
C2 verb /ˈstɪp.əl/

stipple

小さな点で覆う
Meaning
to cover a surface with numerous small dots or specks, often in drawing or painting
Example
The artist stippled the canvas to create a textured effect.
アーティストはキャンバスに小さな点をつけて、テクスチャ効果を作り出しました。
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。
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。
C2 adjective /ˈslʌvənli/

slovenly

だらしない
Meaning
Untidy or careless in appearance, habits, or work.
Example
His slovenly appearance made a bad impression at the interview.
彼のだらしない外見は面接で悪い印象を与えました。
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。
C2 adjective /spraɪ/

spry

活発
Meaning
active and lively, especially in old age
Example
The spry grandmother surprised everyone with her quick dance steps.
活発な祖母は素早いダンスステップで皆を驚かせました。
C2 adjective /sɪər/

sere

枯れた
Meaning
Dry or withered, especially vegetation.
Example
The sere leaves crumbled under his feet.
枯れた葉が彼の足元で崩れた。
C2 adjective /sæŋˈɡwɪniəs/

sanguineous

血液に関連する
Meaning
Relating to blood; bloody.
Example
The surgeon examined the sanguineous discharge from the wound.
外科医は傷口からの血なまぐさい分泌物を調べました。
C2 adjective /sɪˈlæbɪk/

syllabic

音節の
Meaning
Relating to or based on syllables.
Example
The teacher explained the syllabic structure of the word.
先生はその言葉の音節構造を説明しました。
C2 verb /ˈstræɡəl/

straggle

不規則に動く
Meaning
To move or spread in an irregular, scattered, or untidy way.
Example
The children began to straggle behind on the long hike.
子供たちは長いハイキングで後れを取るようになった。
C2 verb /skwɛltʃ/

squelch

Meaning
to make a soft sucking sound, such as when walking on mud; to suppress or silence
Example
His boots squelched in the wet ground.
C2 noun /ˈʃɪbəˌlɛθ/

shibboleth

特定のグループを識別するための表現や信念
Meaning
A custom, phrase, or belief distinguishing a particular group of people, often used to identify outsiders.
Example
The phrase became a political shibboleth during the campaign.
そのフレーズはキャンペーン中に政治的なシボレスとなった。
C2 noun /ˈsɪnjuː/

sinew

腱
Meaning
A tendon; figuratively, the source of strength, power, or resilience.
Example
The sinews in his arms stood out as he lifted the heavy box.
重い箱を持ち上げると、彼の腕の腱が目立ちました。
C2 noun /ˈsɪlədʒɪzəm/

syllogism

三段論法
Meaning
A form of reasoning in which a conclusion is drawn from two given or assumed premises.
Example
The philosopher explained the concept of syllogism using simple examples.
哲学者は簡単な例を使って三段論法の概念を説明しました。
C2 adjective /sɪˈnɜːrdʒɪk/

synergic

シナジック
Meaning
Working together in a cooperative and effective manner.
Example
The two departments have a synergic relationship that boosts productivity.
2つの部署は生産性を高めるシナジックな関係を持っています。
C2 noun /ˈsʌfrədʒɪst/

suffragist

女性参政権運動家
Meaning
a person advocating the extension of suffrage, especially to women
Example
The suffragists organized rallies to demand voting rights for women.
女性参政権運動家たちは女性の投票権を求めて集会を開いた。
C2 adjective ˌsʌr.əpˈtɪʃ.əs

surreptitious

秘密の
Meaning
Kept secret, especially because it would not be approved of; done stealthily.
Example
She took a surreptitious glance at his notes.
彼女は彼のノートをひそかに覗き見た。
C2 verb /ʃiːð/

sheathe

鞘に戻す
Meaning
to put a sword or knife back into its cover
Example
He quickly sheathed his sword after the duel.
彼は決闘の後、素早く剣を鞘に戻した。
C2 noun səˈtaɪ.ə.ti

satiety

満腹感
Meaning
The feeling of being satisfied or full, especially with regard to food.
Example
High-fiber foods provide longer satiety.
高繊維食品はより長い満腹感を提供します。
C2 noun /ˈsʌfərəns/

sufferance

寛容
Meaning
patient endurance of pain, hardship, or delay; passive consent or tolerance
Example
He lived in poverty with quiet sufferance.
彼は貧困の中で静かに寛容をもって生きていた。
C2 adjective, noun /səbˈmɜːrsəbl/

submersible

潜水艇
Meaning
capable of being submerged; a small underwater craft
Example
The scientists explored the deep ocean using a submersible.
科学者たちは潜水艇を使って深海を探査した。
C2 noun /səˈlɪsɪˌtuːd/

solicitude

思いやり, 配慮
Meaning
Care or concern for someone or something.
Example
His mother showed great solicitude for his safety.
彼の母親は彼の安全に大きな思いやりを示しました。
C2 adjective /ˌsuːpərˈæn.ju.eɪ.tɪd/

superannuated

時代遅れの
Meaning
old and no longer useful or valid; retired due to age
Example
The factory was filled with superannuated machines that slowed production.
工場には生産を遅くする時代遅れの機械が満載でした。
C2 noun /sɪˈrɒkoʊ/

sirocco

熱く乾燥した風
Meaning
A hot, dry wind blowing from North Africa across the Mediterranean to southern Europe.
Example
The sirocco made the city unbearably hot and dusty.
シロッコは街を耐えられないほど暑く、ほこりっぽくした。
C2 noun /skriːd/

screed

長く退屈な文書
Meaning
a long, tedious piece of writing or speech; also a layer of material like cement spread on a surface
Example
He delivered a long screed against corruption.
彼は腐敗に反対する長いスピーチをしました。
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。
C2 noun /ˌsuːpərɪnˈtɛndəns/

superintendence

監督
Meaning
the act of overseeing, supervising, or managing
Example
The superintendence of the school is the principal’s duty.
学校の監督は校長の責任です。
C2 noun /sʌbˈɔːl.tən/

subaltern

下級の立場にある人；軍隊では、若い将校
Meaning
A person holding a subordinate position; in the military, a junior officer.
Example
The subaltern was responsible for leading a small platoon of soldiers.
サブオルターナは小さな小隊を指揮する責任がありました。
C2 noun /ˈsɛm.ɪ.nɛr.i/

seminary

神学校
Meaning
A school or college for training priests, ministers, or rabbis.
Example
He decided to enroll in a seminary to study theology.
彼は神学校に入学して神学を学ぶことに決めました。
C2 noun /ˈsuːθˌseɪər/

soothsayer

占い師
Meaning
a person who claims to predict the future
Example
The king consulted a soothsayer before going to war.
王は戦争に行く前に占い師に相談した。