slough
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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 adjective /ˈsiːmli/

seemly

得体
Meaning
proper or appropriate in behavior or appearance
Example
It was not seemly to argue loudly during the ceremony.
在仪式期间大声争论是不合适的。
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 /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 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 /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 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 noun /spjuːm/

spume

泡沫
Meaning
Froth or foam, especially found on waves or liquids.
Example
The waves crashed against the rocks, leaving spume in the air.
波浪撞击岩石，空气中留下泡沫。
C2 noun /ˌsɪmjʊˈleɪkrəm/

simulacrum

拟像
Meaning
an image or representation of someone or something; a superficial likeness
Example
The statue was only a simulacrum of the ancient god.
这座雕像仅仅是古代神灵的拟像。
C2 adjective /stɛnˈtɔːriən/

stentorian

震耳欲聋
Meaning
Extremely loud and powerful in sound.
Example
The teacher’s stentorian voice quieted the noisy classroom.
老师那震耳欲聋的声音让嘈杂的教室安静了下来。
C2 adjective /ˈsiːmi/

seamy

堕落的，肮脏的
Meaning
Morally degraded, unpleasant, or sordid.
Example
The novel reveals the seamy side of city life.
这本小说揭示了城市生活的肮脏一面。
C2 adjective /ˌsuːpərˈnuːmərɛri/

supernumerary

额外的
Meaning
Exceeding the usual number; extra or unnecessary.
Example
The play included several supernumerary actors to fill the background scenes.
这出戏包含了几个额外的演员来填充背景场景。
C2 noun /ˈstrɪk.tʃər/

stricture

限制，批评
Meaning
a restriction or limitation; a critical remark
Example
The new law placed a severe stricture on free speech.
新法律对言论自由施加了严格的限制。
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 /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 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 /ˈseɪ.ɡoʊ/

Sago

萨戈
Meaning
starchy foodstuff obtained from the pith of various tropical palm stems
Example
She prepared sago pudding for dessert.
她为甜点准备了萨戈布丁。
C2 verb /səˈfjuːz/

suffuse

弥漫
Meaning
to gradually spread through or over something
Example
A warm glow suffused her face as she smiled.
当她微笑时，一种温暖的光辉弥漫到她的脸上。
C2 noun /ˈskæb.ərd/

scabbard

剑鞘
Meaning
A sheath for the blade of a sword or dagger, typically made of leather or metal.
Example
The knight drew his sword from the scabbard.
骑士从剑鞘中拔出了剑。
C2 adjective /ˌsɛm.iˈsɪv.ə.laɪzd/

semicivilized

半文明
Meaning
Partially civilized; having some aspects of civilization but not fully developed.
Example
The tribe was described as semicivilized by early explorers.
该部落被早期探险家描述为半文明。
C2 verb /ˈstræɡəl/

straggle

不规则地移动
Meaning
To move or spread in an irregular, scattered, or untidy way.
Example
The children began to straggle behind on the long hike.
孩子们开始在漫长的徒步旅行中掉队。
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 /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 noun /ˈsaɪnɪkjʊər/

sinecure

轻松工作
Meaning
a position requiring little or no work but giving financial benefit or status
Example
He was given a sinecure at the university as a reward for his loyalty.
作为对他忠诚的奖励，他在大学获得了一个轻松的职位。
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 adjective /sɪˈnæp.tɪk/

synaptic

突触的
Meaning
Related to the signal transmission process between nerve cells.
Example
Learning strengthens synaptic connections in the brain.
学习增强大脑中的突触连接。
C2 adjective ˌsʌr.əpˈtɪʃ.əs

surreptitious

秘密
Meaning
Kept secret, especially because it would not be approved of; done stealthily.
Example
She took a surreptitious glance at his notes.
她偷偷地看了一眼他的笔记。
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 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 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 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 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 noun /ˈsʊrmə fɪʃ/

Surma fish

苏尔马鱼
Meaning
a freshwater fish species found in the Surma river system of Bangladesh and northeastern India
Example
Surma fish is native to the rivers of Sylhet region.
苏尔马鱼是西莱特地区河流的本土鱼类。
C2 noun /ˈstætɪks/

statics

静力学
Meaning
The branch of mechanics dealing with bodies at rest and forces in equilibrium.
Example
She is studying statics as part of her engineering course.
她正在学习静力学，作为她工程课程的一部分。
C2 adjective /svelt/

svelte

苗条
Meaning
Attractively thin, graceful, and elegant in appearance or movement.
Example
She looked svelte in the elegant black dress.
她穿着优雅的黑色裙子看起来很苗条。
C2 adjective /sɪˈlæbɪk/

syllabic

音节的
Meaning
Relating to or based on syllables.
Example
The teacher explained the syllabic structure of the word.
老师解释了这个词的音节结构。
C2 noun /ˈsætər/

satyr

幸福
Meaning
a creature from Greek mythology depicted as a lustful being, often half-man and half-goat; by extension, a lecherous man
Example
In the museum mural, a satyr plays the panpipes while dancing in the woods.
当她获得奖项时，她无法掩饰自己的幸福。
C2 adjective /ˈsɛrid/

serried

紧密排列
Meaning
pressed or crowded together, often in rows or ranks
Example
The soldiers stood in serried ranks, ready for inspection.
士兵们站在紧密排列的队列中，准备接受检查。
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 adjective /səˈmætɪk/

somatic

身体的
Meaning
Relating to the body, especially as distinct from the mind.
Example
Yoga can improve both somatic and mental health.
瑜伽可以改善身体和心理健康。
C2 adjective /ˈskʌr.ɪ.ləs/

scurrilous

恶意中伤的
Meaning
Using or expressed in coarse, abusive, or slanderous language.
Example
The politician faced criticism for his scurrilous remarks about his opponent.
那位政治家因其对对手的恶意中伤言论而面临批评。
C2 noun /seɪn/

seine

大网
Meaning
A large fishing net that hangs vertically in the water.
Example
The fishermen cast their seine into the river.
渔民把他们的大网扔进了河里。
C2 noun /ˈsɜːrfɪt/

surfeit

过量
Meaning
an excessive amount of something
Example
There was a surfeit of food at the festival.
节日上食物过量。
C2 adjective /ˈʃɪft.ləs/

shiftless

懒惰
Meaning
Lacking ambition or the ability to accomplish anything; lazy and unmotivated.
Example
He was seen as a shiftless young man with no goals.
他被看作是一个没有目标的懒惰年轻人。
C2 noun /sʌbˈɔːl.tən/

subaltern

处于下级职位的人；在军队中，初级军官
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.
下级军官负责指挥一个小型士兵排。
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 adjective /ˈsʌb.æs.ɪd/

subacid

轻微酸
Meaning
Slightly sour or acidic in taste or nature.
Example
The fruit had a subacid flavor that was refreshing on a hot day.
这种水果有一种轻微酸的味道，在炎热的日子里非常清爽。
C2 noun /ˈsʌfrədʒɪst/

suffragist

妇女参政权运动者
Meaning
a person advocating the extension of suffrage, especially to women
Example
The suffragists organized rallies to demand voting rights for women.
妇女参政权运动者组织了集会，要求为女性争取投票权。
C2 noun /stɛp/

steppe

草原
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.
游牧民族带着他们的牲畜穿越辽阔的草原。
C2 noun /spʌndʒ ɡɔːrd/

Sponse gourd

海绵瓜
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.
海绵瓜可以在年轻时食用，或者干燥后制成天然海绵。
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 verb /ˈsʌbdʒʊˌɡeɪt/

subjugate

征服
Meaning
To bring under domination or control, especially by conquest.
Example
The empire sought to subjugate the neighboring kingdoms.
帝国试图征服邻国。
C2 verb /sweɪð/

swathe

Meaning
To wrap or cover closely or completely.
Example
She swathed the baby in a soft blanket.
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 /ˈstiː.vəˌdɔːr/

stevedore

装卸工
Meaning
A person employed to load and unload cargo from ships.
Example
The stevedores worked tirelessly to unload the cargo before dawn.
装卸工们不知疲倦地工作，直到黎明前卸下货物。
C2 noun (plural, informal) /skædz/

scads

一大堆
Meaning
A large number or quantity of something (informal).
Example
She has scads of friends in the city.
她在城市里有一大堆朋友。
C2 noun /ˈsɛrəf/

seraph

六翼天使
Meaning
An angelic being associated with light and purity, often depicted as a high-ranking angel in Christian theology.
Example
The stained-glass window depicted a seraph with outstretched wings.
彩色玻璃窗描绘了一个展开翅膀的六翼天使。
C2 adjective /ˌsɒpəˈrɪfɪk/

soporific

幸福
Meaning
tending to induce drowsiness or sleep; causing sleepiness
Example
The professor's lecture was so soporific that half the class fell asleep.
当她收到奖项时，她无法掩饰自己的快乐。
C2 adjective /səˈɡeɪ.ʃəs/

sagacious

贤明
Meaning
Having or showing keen mental discernment and good judgment; wise.
Example
His sagacious leadership saved the company from failure.
他的贤明领导力使公司免于失败。
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 /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 adjective /sɪˈdɪʃəs/

seditious

煽动叛乱的
Meaning
Encouraging rebellion against authority.
Example
The activist spread seditious pamphlets among the crowd.
活动家在群众中散发了煽动叛乱的传单。
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 /ˈslʌɡərd/

sluggard

懒汉
Meaning
A lazy, sluggish person.
Example
The sluggard refused to get out of bed even at noon.
懒汉拒绝在中午起床。
C2 adjective /ˈsæpɪd/

sapid

美味的
Meaning
Having a pleasant taste; flavorful.
Example
The chef prepared a sapid dish that delighted everyone at the table.
厨师准备了一道美味的菜肴，令桌上的每个人都非常喜欢。
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 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 /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.
博物馆展示了来自古埃及的美丽雕刻的石棺。
C2 noun /ˈsɪlvər kɑrp/

Silver carp

银鲤
Meaning
a large freshwater fish with silvery scales, commonly farmed for food
Example
Silver carp is widely cultivated in fish farms across Asia.
银鲤在亚洲的鱼场中被广泛养殖。
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 /səˈvɑːnt/

savant

Meaning
a learned person, especially a distinguished scientist or scholar; sometimes used in the phrase ‘savant syndrome’ for someone with exceptional abilities alongside developmental differences
Example
The conference keynote was delivered by a linguistic savant who studies endangered languages.
C2 verb /ˌsuːpərˈæn.ju.eɪt/

superannuate

带薪退休
Meaning
to retire someone with a pension, usually due to age or long service
Example
The company decided to superannuate its senior employees after thirty years of service.
公司决定在三十年的服务后将其高级员工带薪退休。
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 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 /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 verb /ˈsʌk.əl/

suckle

哺乳
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.
母猫在篮子里哺乳她的小猫。
C2 adjective /ˈsækərɪn/

saccharine

幸福
Meaning
Excessively sweet or sentimental.
Example
His saccharine smile seemed insincere.
她在获得奖项时无法隐藏她的幸福。
C2 noun /ˈsuːθˌseɪər/

soothsayer

预言家
Meaning
a person who claims to predict the future
Example
The king consulted a soothsayer before going to war.
国王在出征前咨询了一个算命师。
C2 noun /sɪˈmɪlɪtjuːd/

Similitude

相似; 类似
Meaning
the quality or state of being similar; resemblance
Example
The similitude between the two paintings suggested they were by the same artist.
这两幅画之间的相似性表明它们是由同一位艺术家创作的。
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 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 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 /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 adjective /spraɪ/

spry

灵活
Meaning
active and lively, especially in old age
Example
The spry grandmother surprised everyone with her quick dance steps.
灵活的奶奶用快速的舞步让所有人都惊讶不已。
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 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 /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 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 noun /skriːd/

screed

冗长而乏味的文章
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.
他发表了长篇的关于腐败的演讲。
C2 adjective /sɪˈkweɪʃəs/

sequacious

盲目追随
Meaning
Lacking independence of thought; blindly following.
Example
The sequacious students never questioned their teacher's opinions.
盲目追随的学生从未质疑过他们老师的意见。
C2 adjective /ˈsʌmp.tʃuˌɛr.i/

sumptuary

与限制个人奢侈品支出的法律或规定相关
Meaning
Relating to laws or regulations intended to limit personal spending on luxury goods.
Example
In medieval Europe, sumptuary laws restricted the wearing of expensive fabrics to the nobility.
在中世纪欧洲，奢侈品法限制了只有贵族才能穿戴昂贵的面料。
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 noun /ˌʃæŋɡriˈlɑː/

shangri-la

虚构的乐园
Meaning
a remote, beautiful, imaginary place where life is perfect and peaceful
Example
They described the island as a modern-day Shangri-La.
他们将这个岛屿描述为现代版的香格里拉。
C2 noun /ˌsɪnjuˈɒsɪti/

sinuosity

弯曲性
Meaning
The quality or state of being winding, curving, or having many turns.
Example
The sinuosity of the river made navigation challenging.
河流的弯曲性使得导航变得具有挑战性。
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 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 /ˈsteɪtkraft/

statecraft

治国艺术
Meaning
The art of governing and managing state affairs effectively.
Example
The leader was praised for his exceptional statecraft in handling international relations.
领导因其在处理国际关系方面的卓越治国艺术而受到赞扬。
C2 noun /ˈsɪnjuː/

sinew

肌腱
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.
当他举起沉重的箱子时，他手臂上的肌腱明显凸出。
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 /ˈsælvoʊ/

salvo

齐射
Meaning
A simultaneous discharge of guns or release of bombs; a sudden outburst of cheers or applause.
Example
The soldiers fired a salvo to honor the fallen general.
士兵们开了一轮齐射，以向已故将军致敬。
C2 noun /sɛnˈsɔːrɪəm/

sensorium

感觉中枢
Meaning
The part of the brain or mind concerned with the reception and interpretation of sensory stimuli.
Example
The patient’s sensorium was clouded after the accident.
事故后，病人的感觉中枢受到干扰。
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 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 /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 /ˈskɔːrpiən fɪʃ/

Scorpion fish

蝎子鱼
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.
蝎子鱼有危险的刺，可以注入毒液。
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 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 /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 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 /ˈsaʊər wʊd ˈæp.əl/

Sour wood apple

大象苹果
Meaning
a tropical fruit with hard shell and tangy flesh; elephant apple
Example
The sour wood apple has a unique taste that many people enjoy.
大象苹果有一种独特的味道，许多人喜欢。
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 /ʃiːf/

sheaf

麦束
Meaning
a bundle of grain stalks laid lengthwise and tied together after reaping; a bundle of objects tied together
Example
The farmer carried a sheaf of wheat on his shoulder.
农民肩上背着一捆小麦。
C2 verb /ˈsɛreɪt/

serrate

锯齿边缘
Meaning
To make a saw-toothed edge or notched margin.
Example
The craftsman serrated the knife blade for better cutting.
工匠将刀片锯齿化，以提高切割效果。
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 /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 noun /ˌsɒ̃ˈfrwɑː/

sangfroid

冷静
Meaning
Composure or coolness under pressure.
Example
She impressed everyone with her sangfroid during the interview.
她在面试中以冷静给大家留下了深刻印象。
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 /ˈsʌpliənt/

suppliant

恳求者
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.
恳求者在国王的脚下乞求怜悯。
C2 verb /ˌsuːpərˈhiːt/

superheat

过热
Meaning
to heat a substance beyond its normal boiling point without it becoming vapor
Example
Engineers superheat the steam to increase the efficiency of the turbine.
工程师将蒸汽超热以提高涡轮机的效率。
C2 noun /skʌlˈdʌɡəri/

skulduggery

欺诈
Meaning
underhanded or dishonest behavior
Example
The politician was accused of financial skulduggery.
这位政治家因金融欺诈而受到指控。
C2 adjective /ˌsɛm.iˈkɒn.ʃəs/

semiconscious

半意识的
Meaning
Only partly conscious; not fully aware of surroundings.
Example
He was semiconscious after the accident and could barely respond.
他在事故后半意识清醒，几乎无法回应。