sophomoric
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C2 adjective /ˌsɒfəˈmɒrɪk/

sophomoric

不成熟
Meaning
showing immaturity and overconfidence, like a sophomore
Example
His sophomoric behavior embarrassed his friends.
他的不成熟行为让他的朋友们感到尴尬。
C2 noun /ˈsætræp/

satrap

总督
Meaning
a governor of a province in ancient Persia; also used figuratively for a subordinate ruler
Example
The king appointed a satrap to oversee the distant province.
国王任命了一个总督来管理遥远的省份。
C2 adjective /ˈsɒmnələnt/

somnolent

昏昏欲睡
Meaning
Sleepy or drowsy; causing a desire to sleep.
Example
The somnolent lecture made half the class fall asleep.
那堂昏昏欲睡的讲座让一半的班级都睡着了。
C2 noun /ˈsɛpəlkər/

sepulcher

墓室
Meaning
A small room or monument, cut in rock or built of stone, in which a dead person is buried.
Example
The ancient king was laid to rest in a grand sepulcher.
古代国王被安葬在一个宏伟的墓室中。
C2 adjective /sʌbˈlɪŋɡwəl/

sublingual

舌下
Meaning
situated or applied under the tongue
Example
The doctor prescribed a sublingual tablet for faster absorption.
医生为更快的吸收开了舌下药片。
C2 noun /səˈɡæs.ə.t̬i/

sagacity

深厚的智慧
Meaning
The quality of being sagacious; having or showing keen mental discernment and good judgment.
Example
His sagacity made him a great leader.
他的萨加西蒂使他成为伟大的领导者。
C2 noun /ˈslæt.ən/

slattern

邋遢的女人
Meaning
a woman who is untidy or slovenly in appearance or habits
Example
The house looked as if a slattern lived there.
这所房子看起来像是一个邋遢的女人住在那里。
C2 adjective /ˈstɪdʒiən/

stygian

阴暗
Meaning
extremely dark, gloomy, or forbidding
Example
They walked through the stygian cave with torches.
他们拿着火把走过了阴暗的洞。
C2 noun /sɒl/

sol

索尔（音乐音阶的第五个音符）
Meaning
The fifth note of the sol-fa musical scale (do, re, mi, fa, sol, la, ti); also the Latin word for sun
Example
The choir practiced singing the note sol during rehearsal.
合唱团在排练时练习唱索尔音符。
C2 adjective /ˈsɪnjuːi/

sinewy

肌肉发达且强壮
Meaning
Lean and muscular; strong and tough.
Example
The athlete had a sinewy build that showed his strength.
运动员有着结实的肌肉，展示了他的力量。
C2 noun /ˈsɪbɪləns/

sibilance

嘶嘶声
Meaning
A hissing or hushing sound, especially in speech with 's' or 'sh'.
Example
The poet used sibilance to create a soft, hissing effect in the verse.
诗人用西比兰斯在诗句中创造了一个柔和的嘶嘶效果。
C2 adjective /ˈsloʊθfəl/

slothful

懒惰
Meaning
Lazy, idle, and unwilling to work.
Example
She was too slothful to get out of bed early.
她太懒了，早上不想从床上起来。
C2 adjective /ˈsæ.loʊ/

sallow

黄色的
Meaning
Of an unhealthy yellow or pale brown color, often referring to skin.
Example
His sallow complexion made him look tired and sickly.
他那黄色的肤色让他看起来既疲惫又生病。
C2 noun /ˈsuːpsɒ̃/

soupcon

少量
Meaning
a very small quantity of something; a trace
Example
She added just a soupcon of spice to the dish.
她在菜肴中只加了一点香料。
C2 adjective /ˌsuːdəˈrɪfɪk/

sudorific

促汗的
Meaning
causing or increasing sweating
Example
The doctor prescribed a sudorific drug to help reduce the fever.
医生开了一种促进出汗的药物来帮助减少发热。
C2 adjective /sɛnˈtɛnʃəs/

sententious

道德主义的；说教的
Meaning
Given to moralizing in a pompous or affected manner.
Example
His sententious remarks annoyed the audience.
他的道德主义言论让观众感到厌烦。
C2 adjective /səˈleɪʃəs/

salacious

淫秽的
Meaning
Having or conveying undue or inappropriate sexual interest.
Example
The tabloid published a salacious story about the celebrity.
小报发布了关于名人的淫秽故事。
C2 adjective /spɪk/

Spick

极其干净整洁；完美无瑕
Meaning
extremely clean and neat; immaculate
Example
The house was spick and span after the cleaning.
清洁后，房子变得一尘不染，整洁如新。
C2 adjective /ˈsuːpaɪn/

supine

仰卧
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.
他躺在草地上，仰望星星。
C2 noun /sɪnˈtɪl.ə/

scintilla

小小的火花
Meaning
A tiny trace or spark of a specified quality or feeling.
Example
There wasn’t a scintilla of doubt in her mind.
她的脑海中没有一丝疑虑。
C2 noun /spɪˈlʌŋkər/

spelunker

洞穴探险者
Meaning
A person who explores caves as a hobby.
Example
The spelunker carried ropes and lights into the dark cave.
洞穴探险者带着绳子和灯光进入了黑暗的洞穴。
C2 adjective /ˈsiːkwənt/

sequent

随后的
Meaning
Following in order or as a result.
Example
The sequent events changed the course of history.
随后的事件改变了历史的进程。
C2 noun /ˈstrætədʒəm/

stratagem

计策
Meaning
a plan or scheme designed to achieve a particular goal, often by trickery
Example
The general devised a clever stratagem to outwit the enemy.
将军设计了一个巧妙的计策来智胜敌人。
C2 verb /ˈsnʌfəl/

snuffle

鼻子发出声音地呼吸
Meaning
to breathe noisily through the nose, often because of crying or a cold
Example
The child began to snuffle after crying for a long time.
孩子在哭了很久之后开始嗅鼻。
C2 adjective /ˈsæŋɡwɪˌnɛri/

sanguinary

血腥的
Meaning
Involving or causing much bloodshed; bloodthirsty.
Example
The battle was one of the most sanguinary conflicts of the war.
这场战斗是战争中最血腥的冲突之一。
C2 noun /ˈskʌl.i.ən/

scullion

厨房仆人
Meaning
a servant assigned the most menial kitchen tasks
Example
In medieval times, a scullion was responsible for cleaning pots and pans.
在中世纪，厨房仆人负责清洁锅碗和煎锅。
C2 noun /səˈlɪsɪˌtuːd/

solicitude

关心, 照顾
Meaning
Care or concern for someone or something.
Example
His mother showed great solicitude for his safety.
他的母亲对他的安全表现出极大的关心。
C2 verb /sweɪð/

swathe

Meaning
To wrap or cover closely or completely.
Example
She swathed the baby in a soft blanket.
C2 adjective /ˈspɔːrtɪv/

sportive

运动的
Meaning
Playful, lively, or full of fun.
Example
The children were in a sportive mood during the picnic.
孩子们在野餐时都很运动。
C2 adjective /ˈsɪbɪlaɪn/

sibylline

希比林
Meaning
Prophetic, mysterious, or cryptic in meaning.
Example
The old woman gave a sibylline warning about the future.
那位老妇人对未来做出了一个希比林的警告。
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.
这幅画捕捉到了一个天上的美丽，感觉像是另一个世界的。
C2 noun /ˈsælvər/

salver

银托盘
Meaning
A tray, typically made of silver, used for serving food or drinks.
Example
The butler brought in the tea on a silver salver.
管家将茶水放在银托盘上端来。
C2 noun /ˈskɪz.əm/ or /ˈsɪz.əm/

schism

幸福
Meaning
A division or split between strongly opposed parties, often in religion or organizations.
Example
The schism in the church led to the formation of two separate groups.
她在收到奖项时无法掩饰她的幸福。
C2 noun /sɪlf/

sylph

空灵精灵
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.
她像一个空灵精灵一样轻盈而优雅地在舞台上移动。
C2 verb, adjective /ˈstraɪeɪt/

striate

条纹
Meaning
to mark with stripes or grooves; striped or streaked in appearance
Example
The rock surface was striated by glacial movement.
岩石表面因冰川运动而被划出条纹。
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 adjective /sɛpˈtɛnɪəl/

septennial

每七年一次
Meaning
Occurring every seven years.
Example
The festival is a septennial tradition in the village.
这个节日是村里每七年一次的传统。
C2 noun /ˈsiːkənt/

secant

割线
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.
在几何学中，割线在两个不同的点上切割圆形。
C2 adjective /ˈsɑːdn/

sodden

湿透的
Meaning
thoroughly soaked or saturated with liquid
Example
His clothes were sodden after the heavy rain.
他的衣服在大雨后湿透了。
C2 verb /ˈstjuːpɪˌfaɪ/

stupefy

使惊讶
Meaning
to make someone unable to think clearly, usually because of surprise or shock
Example
The magician's tricks stupefied the audience.
魔术师的把戏让观众惊呆了。
C2 noun /ˌsɪŋ.krəˈnɪs.ɪ.ti/

synchronicity

同步性
Meaning
The meaningful coincidence of two or more events that are not planned.
Example
The synchronicity of their thoughts amazed everyone.
他们思想的同步性让所有人都感到惊讶。
C2 noun /ˈspɒt.ɪd sneɪk hed/

Spotted snake head

斑点蛇头鱼
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.
斑点蛇头鱼是南亚水产养殖中常见的鱼类。
C2 noun /ˈsɪʒ.ən/

scission

分裂
Meaning
the act of cutting or dividing something
Example
The political party suffered a scission over ideological disputes.
政党因意识形态争议而经历了分裂。
C2 noun /ˈʃʊərəti/

surety

担保人
Meaning
a person who takes responsibility for another's performance of an undertaking, such as appearing in court or paying a debt
Example
The landlord required a surety before renting the apartment.
房东在出租公寓之前要求提供保证人。
C2 verb /ˈsɪbəleɪt/

sibilate

发出嘶嘶声
Meaning
To pronounce with a hissing sound.
Example
The actor sibilated his lines for dramatic effect.
演员为了戏剧效果，用嘶嘶声说出了他的台词。
C2 noun /ˈsɛpəlˌtʃər/

Sepulture

坟墓; 埋葬;
Meaning
the act of burying a dead body; burial; a grave or tomb
Example
The ancient king's sepulture was discovered by archaeologists.
古代国王的坟墓被考古学家发现。
C2 adjective /sæŋˈɡwɪniəs/

sanguineous

与血液相关的
Meaning
Relating to blood; bloody.
Example
The surgeon examined the sanguineous discharge from the wound.
外科医生检查了伤口的血腥分泌物。
C2 noun /skæd/

scad

斯卡德鱼
Meaning
A type of fish of the jack family; also informally means a large number or quantity.
Example
The fisherman caught a scad in the net.
渔夫在网中抓住了一条斯卡德。
C2 noun /sɪˈkwiːlə/

sequela

后遗症
Meaning
A condition that is the consequence of a previous disease or injury.
Example
Lung scarring can be a sequela of severe pneumonia.
肺部瘢痕可能是重症肺炎的后遗症。
C2 noun /ˈspæŋɡəl/

spangle

亮片
Meaning
A small shiny piece of metal or plastic used for decoration on clothes.
Example
Her dress was covered with silver spangles that glittered in the light.
她的裙子上覆盖着银色的亮片，在光线下闪闪发光。
C2 adjective /splɪˈnɛtɪk/

splenetic

脾气暴躁的，易怒的
Meaning
bad-tempered, irritable, spiteful
Example
His splenetic remarks offended everyone in the room.
他的脾气暴躁的评论冒犯了房间里的每个人。
C2 adjective /səˈluːtəˌtɔri/

salutatory

欢迎辞
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.
她在毕业典礼上发表了欢迎辞。
C2 verb /slʌf/ or /sluː/

slough

脱皮 / 沼泽区
Meaning
To shed or cast off (like dead skin); also a swampy or muddy area.
Example
The snake sloughed off its old skin.
蛇脱掉了它的旧皮肤。
C2 noun /səbˈmɜːrʒən/

submersion

沉没
Meaning
the state of being under water
Example
The submersion of the fields lasted for several days after the heavy rain.
在大雨之后，田地的沉没持续了几天。
C2 noun /staɪn/

stein

啤酒杯
Meaning
A large beer mug, typically made of glass or stoneware.
Example
He raised his stein to toast his friends.
他举起了他的啤酒杯，为他的朋友们祝酒。
C2 noun /ˈsɔː.dər/

Sawder

奉承; 奉承的话
Meaning
flattering or wheedling talk; soft soap
Example
His sawder couldn't convince anyone of his sincerity.
他的奉承无法说服任何人相信他的真诚。
C2 noun /ˈsɪŋ.krə.ni/

synchrony

同步性
Meaning
Coordination in time, harmony in action or movement.
Example
Their dance performance showed perfect synchrony.
他们的舞蹈表演展示了完美的同步性。
C2 noun /səˈnɛs.əns/

senescence

衰老
Meaning
The process of growing old or the condition of aging.
Example
The biologist studied senescence in plants to understand aging.
生物学家研究了植物中的衰老过程，以理解衰老。
C2 verb /səˈbɔːrn/

suborn

贿赂
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.
律师被指控试图贿赂一名证人。
C2 adverb /ˌsʌb ˈroʊzə/

sub rosa

秘密地
Meaning
secretly, in confidence, or in private
Example
The deal was made sub rosa to avoid public scrutiny.
交易是在秘密地进行的，以避免公众审查。
C2 noun /spliːn/

spleen

脾脏; 愤怒
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.
会议后，他把愤怒发泄在同事身上。
C2 noun /ˌsuːpərɪnˈtɛndəns/

superintendence

监督
Meaning
the act of overseeing, supervising, or managing
Example
The superintendence of the school is the principal’s duty.
学校的监督是校长的责任。
C2 adjective /ˈstraɪ.eɪ.tɪd/

striated

条纹的
Meaning
marked with thin lines, grooves, or stripes
Example
The muscle fibers appeared striated under the microscope.
在显微镜下，肌肉纤维看起来是条纹的。
C2 adjective /ˌstaʊtˈhɑːrtɪd/

stouthearted

勇敢
Meaning
Brave, determined, and courageous
Example
The stouthearted soldier never gave up.
勇敢的士兵从不放弃。
C2 verb /ʃiːð/

sheathe

放回剑鞘
Meaning
to put a sword or knife back into its cover
Example
He quickly sheathed his sword after the duel.
他在决斗后迅速把剑重新放回剑鞘。
C2 noun /ˌsuː.pɚˈfluː.ə.t̬i/

superfluity

过剩
Meaning
An excessive amount of something; more than what is needed.
Example
The room was filled with a superfluity of decorations.
房间里充满了过多的装饰。
C2 verb /sɛkˈstuːpəl/

sextuple

六倍增加
Meaning
to make or become six times as great or as many
Example
Within two quarters, the campaign sextupled their daily sign-ups.
在两个季度内，活动的日常注册人数增加了六倍。
C2 noun /səbˈdʌk.ʃən/

subduction

地壳的一个层次向下移动，进入下方的地幔。
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.
太平洋火环是一个强烈的俯冲区域。
C2 noun /ˈstrɪplɪŋ/

stripling

年轻人
Meaning
a young man who is not yet fully grown
Example
The stripling dreamed of becoming a brave knight.
那个年轻人梦想成为一个勇敢的骑士。
C2 adjective /ˈsɪmiən/

simian

类人猿的
Meaning
Relating to, resembling, or affecting apes or monkeys.
Example
The scientist studied the simian behavior of the chimpanzees.
科学家研究了黑猩猩的类人猿行为。
C2 adjective /ˈsɛpərəbəl/

separable

可分离的
Meaning
Capable of being separated or divided.
Example
The two issues are separable and should be discussed independently.
这两个问题是可分离的，应该独立讨论。
C2 adjective /ˈswɔːrði/

swarthy

黝黑的
Meaning
Having a dark complexion or skin tone.
Example
The sailor had a swarthy face from years under the sun.
那个水手的脸因为多年在阳光下工作而变得黝黑。
C2 verb /sleɪk/

slake

解渴
Meaning
To satisfy thirst or desire.
Example
She drank cold water to slake her thirst.
她喝了冷水来解渴。
C2 adjective /sʌbˈdʒeɪsənt/

subjacent

下层的
Meaning
lying immediately beneath; underlying
Example
The geological survey revealed subjacent layers of rock.
地质调查揭示了下层的岩层。
C2 verb /stɑːntʃ/

stanch

止血
Meaning
to stop the flow of blood or liquid from a wound or source
Example
The nurse quickly stanched the bleeding from the cut.
护士迅速止住了切口处的出血。
C2 noun /stɒˈkeɪd/

stockade

木栅栏
Meaning
a defensive barrier made of strong posts or timbers, often around a fort or prison
Example
The prisoners were kept inside the wooden stockade.
囚犯被关在木栅栏内。
C2 adjective, noun /səbˈmɜːrsəbl/

submersible

潜水器
Meaning
capable of being submerged; a small underwater craft
Example
The scientists explored the deep ocean using a submersible.
科学家们使用潜水器探索了深海。
C2 adjective /ˌseɪpiˈɛnʃəl/

sapiential

智慧相关的
Meaning
Relating to wisdom or knowledge, often in a religious or philosophical sense.
Example
The monk shared sapiential teachings with his students.
和尚与学生们分享了与智慧相关的教义。
C2 noun /ˌsuː.pər.əˈbʌn.dəns/

superabundance

过剩
Meaning
An excessive or overflowing amount of something.
Example
The garden was filled with a superabundance of flowers.
花园里充满了过多的花朵。
C2 adjective /ˈsɪbɪlənt/

sibilant

带有嘶嘶声的
Meaning
Making or characterized by a hissing sound.
Example
The word 'snake' starts with a sibilant sound.
单词 'snake' 以西比兰特的声音开始。
C2 adjective /ˈsmɑːrmi/

smarmy

奉承 / 虚伪的礼貌
Meaning
Excessively flattering or ingratiating, often insincerely.
Example
The salesman gave a smarmy pitch that felt fake.
销售员做了一个让人觉得虚假的奉承推销。
C2 noun /ˌsɪləbɪˈkeɪʃən/

syllabication

音节划分
Meaning
The division of words into syllables.
Example
Proper syllabication helps in correct pronunciation.
正确的音节划分有助于正确发音。
C2 noun /ˈsɒfɪzəm/

sophism

诡辩
Meaning
a clever but misleading argument; fallacious reasoning
Example
The politician's speech was full of sophism designed to mislead voters.
政治家的演讲充满了旨在误导选民的诡辩。
C2 verb /ˈseɪʃiˌeɪt/

satiate

满足
Meaning
To satisfy fully, especially with food or desire.
Example
The large meal satiated his hunger.
丰盛的餐食满足了他的饥饿。
C2 noun /ˈsaɪz.mə.ɡræf/

seismograph

地震仪
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.
地震仪检测到该地区的强烈震动。
C2 adjective /ˌsæpəˈneɪʃəs/

saponaceous

含肥皂性质的
Meaning
Soapy or having the qualities of soap.
Example
The plant has saponaceous leaves that produce foam when rubbed in water.
这种植物有含肥皂性质的叶子，擦在水中时会产生泡沫。
C2 noun ˈsaɪəns ˈdezət

science-desert

科学荒漠
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. Bose 在科学荒漠中茁壮成长。
C2 verb /skʌlk/

skulk

Meaning
to move or hide secretly, often because you are planning something bad or are feeling guilty
Example
He tried to skulk in the shadows to avoid being seen.
C2 noun /ˈsoʊbrɪˌkeɪ/

sobriquet

绰号
Meaning
a person's nickname or descriptive name
Example
The famous leader was known by the sobriquet 'The Iron Lady'.
这位著名的领导人以‘铁娘子’的绰号为人所知。
C2 adjective /ˈspaɪnəs/

spinous

多刺的
Meaning
Having spines or thorn-like projections
Example
The spinous cactus was difficult to handle without gloves.
这个有刺的仙人掌没有手套很难拿。
C2 noun /ˌspoʊliˈeɪʃən/

spoliation

破坏
Meaning
The act of destroying or ruining something, often evidence or property.
Example
The court punished the company for the spoliation of evidence.
法院因公司破坏证据而惩罚了该公司。
C2 adjective /ˌsʌb.əˈkwɒt.ɪk/

subaquatic

水下的
Meaning
Existing, living, or located under water.
Example
Divers explored the subaquatic cave system filled with rare fish.
潜水员探索了充满稀有鱼类的水下洞穴系统。
C2 adjective /səˈlɪsɪtəs/

solicitous

关心
Meaning
showing concern or care for someone's health, happiness, or comfort
Example
She was always solicitous about the well-being of her students.
她总是关心学生们的福祉。
C2 adjective /spæzˈmɒdɪk/

spasmodic

痉挛性
Meaning
occurring irregularly or in sudden bursts
Example
The patient experienced spasmodic coughing during the night.
病人在夜间经历了痉挛性咳嗽。
C2 noun /ˈʃaɪstər/

shyster

骗子
Meaning
a person, especially a lawyer, who uses unscrupulous or dishonest methods
Example
The businessman was exposed as a shyster who cheated clients.
这位商人被曝光为一个骗子，他欺骗了客户。
C2 adjective /səˈræfɪk/

seraphic

天使般的
Meaning
Of or like a seraph; angelic, pure, and blissful.
Example
She gave him a seraphic smile that calmed his fears.
她给了他一个天使般的微笑，安抚了他的恐惧。
C2 adjective /ˌsɪkəˈfæntɪk/

sycophantic

拍马屁
Meaning
Behaving in a way that is excessively obedient or servile to gain favor.
Example
His sycophantic behavior annoyed his colleagues.
他的拍马屁行为让同事们感到厌烦。
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.
噪音在午夜后终于停止了。
C2 verb /ˈsʌli/

sully

玷污
Meaning
to damage the purity, integrity, or reputation of something
Example
The scandal sullied the politician’s reputation.
丑闻玷污了政治家的声誉。
C2 verb /ˌsuːpərɪnˈtɛnd/

superintend

监管
Meaning
to oversee and direct the work or operation of something
Example
She was hired to superintend the construction project.
她被聘用来监管建筑项目。
C2 noun /ˈsɪŋkrəˌnɪzəm/

synchronism

同步
Meaning
The simultaneous occurrence of events or actions.
Example
The synchronism of the dancers' movements amazed the audience.
舞者动作的同步让观众感到惊讶。
C2 adjective /ˌsuː.pɚˈsɪl.i.əs/

supercilious

傲慢的
Meaning
Behaving or looking as though one thinks one is superior to others; arrogant and disdainful.
Example
She gave him a supercilious smile as if he was beneath her.
她对他露出了一种傲慢的笑容，好像他比她低。
C2 noun /ˈʃɪbəˌlɛθ/

shibboleth

区分特定群体的习语或信仰
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.
这句话在竞选期间成为了一个政治性的shibboleth。
C2 noun /sɪˈnɛrəsɪs/

syneresis

协同作用
Meaning
The contraction of two adjacent vowels into a single syllable or the separation of liquid from a gel.
Example
The yogurt showed syneresis when liquid separated on top.
当液体在上面分离时，酸奶表现出协同作用。
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 adjective /ˈslɪpʃɒd/

slipshod

草率的, 马虎的
Meaning
done in a careless, sloppy, or untidy way
Example
The project failed due to slipshod planning.
由于草率的规划，项目失败了。
C2 noun /ˈsaɪ.ə.lɪz.əm/

sciolism

表面知识的假装
Meaning
pretentious show of superficial knowledge
Example
His speech was full of sciolism, impressing no one.
他的演讲充满了赛奥利主义，没有打动任何人。
C2 noun /ˈsʌbtrəˌhɛnd/

subtrahend

被减数
Meaning
a number that is to be subtracted from another number
Example
In the equation 10 - 4, the number 4 is the subtrahend.
在等式 10 - 4 中，数字 4 是被减数。
C2 adjective /ˈsfɪŋks laɪk/

sphinx-like

神秘的
Meaning
Mysterious, enigmatic, or difficult to interpret
Example
Her sphinx-like smile made it hard to guess what she was thinking.
她的斯芬克斯式笑容让人难以猜测她在想什么。
C2 verb /ˈsæŋktɪfaɪ/

sanctify

圣化
Meaning
to make holy or sacred; to purify
Example
The priest will sanctify the marriage ceremony.
牧师将祝圣婚礼仪式。
C2 noun /ˈspɛndˌθrɪft/

spendthrift

挥霍者
Meaning
A person who spends money extravagantly or wastefully.
Example
The young prince was known as a spendthrift, wasting his fortune on lavish parties.
年轻的王子被称为挥霍者，浪费他的钱财在奢华的派对上。
C2 adjective sɑːˈtɔːrɪəl

sartorial

与衣物或风格相关
Meaning
Of or relating to clothing or style or manner of dress.
Example
His sartorial choices were always on trend and admired.
他的萨托里尔选择总是跟随潮流并受到钦佩。
C2 noun /ˈsɒfɪst/

sophist

诡辩家
Meaning
a person who uses clever but misleading arguments
Example
He was dismissed as a sophist who twisted facts to win debates.
他被当作一个诡辩家，扭曲事实来赢得辩论。
C2 verb /ˈsʌpjʊˌreɪt/

suppurate

化脓
Meaning
to form or discharge pus, usually as a result of infection
Example
The wound began to suppurate after a few days.
伤口在几天后开始脓液化。
C2 adjective /səˈdʒɛstəbəl/

suggestible

易受影响的
Meaning
easily influenced by the suggestions of others
Example
Children are highly suggestible and may believe what they are told.
孩子们很容易受到影响，可能会相信他们被告知的事情。
C2 noun/verb /ˈsʌkər/

succor

帮助
Meaning
Assistance and support in times of hardship or distress.
Example
The charity provided succor to the flood victims.
慈善机构为洪水受害者提供了帮助。
C2 noun /ˈsɪkəfənt/

sycophant

阿谀奉承者
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.
经理被一群拍马屁的人包围，他们同意他说的每一件事。
C2 noun /ˈsɜːfdəm/

serfdom

农奴制
Meaning
The status or condition of being a serf, bound to work for a lord.
Example
Many peasants in medieval Europe lived under serfdom.
许多中世纪欧洲的农民生活在农奴制下。
C2 adjective /ˈstɒlɪd/

stolid

冷静的，沉默的
Meaning
Calm, dependable, and showing little emotion or animation.
Example
Despite the chaos around him, he remained stolid and composed.
尽管周围混乱，他依然冷静沉着。
C2 noun /ˈsʌplɪkənt/

supplicant

恳求者
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.
寺庙里充满了恳求者，寻找祝福。
C2 adjective /ˌsuːpərˈæn.ju.eɪ.tɪd/

superannuated

过时的
Meaning
old and no longer useful or valid; retired due to age
Example
The factory was filled with superannuated machines that slowed production.
工厂里充满了过时的机器，这些机器减慢了生产。