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A1 noun /stɑːr/

Star

estrella
Meaning
a fixed luminous point in the night sky that produces light and heat through nuclear fusion
Example
Thousands of stars are visible in the clear night sky.
Miles de estrellas son visibles en el cielo despejado de la noche.
A1 noun /sɔːŋ/

song

canción
Meaning
a short piece of music with words that are sung
Example
She sang a beautiful song at the concert.
Ella cantó una hermosa canción en el concierto.
B2 adjective /ˌsuː.pəˈnætʃ.ər.əl/

Supernatural

sobrenatural
Meaning
relating to things that cannot be explained by natural or scientific laws; beyond the normal or physical world
Example
The old house was said to have supernatural powers.
Se decía que la casa vieja tenía poderes sobrenaturales.
C1 noun /stæɡˈneɪ.ʃən/

stagnation

estancamiento
Meaning
A state of inactivity or lack of growth, especially in an economy.
Example
High unemployment led to economic stagnation.
El alto desempleo condujo al estancamiento económico.
A2 noun /skɪl/

skill

habilidad
Meaning
the ability to do something well through training or experience
Example
Her skill in painting impressed everyone.
Su habilidad en la pintura impresionó a todos.
C1 adjective /ˈseɪ.li.ənt/

salient

importante, prominente o llamativo
Meaning
Most important, prominent, or noticeable
Example
The report highlighted the salient points of the discussion.
El informe destacó los puntos más importantes de la discusión.
B1 noun /saɪt/

site

lugar
Meaning
a location or place, often used for a specific purpose, such as a construction site or a website
Example
The construction site is ready for the next phase of the project.
El sitio de construcción está listo para la siguiente fase del proyecto.
A2 adjective /ˈsɛvrəl/

several

varios
Meaning
more than one but not many; a few
Example
Several people attended the meeting yesterday.
Varios personas asistieron a la reunión ayer.
C1 adjective /ˈʃɑːdi/

shoddy

de mala calidad
Meaning
badly made or done; of poor quality
Example
The contractor did a shoddy job on the repairs.
El contratista hizo un trabajo de mala calidad en las reparaciones.
C1 noun /ˈskwɒlər/

squalor

miseria
Meaning
the state of being extremely dirty and unpleasant, especially due to poverty or neglect
Example
They lived in squalor without basic facilities.
Vivían en la miseria sin instalaciones básicas.
B2 noun /ˈspaɪs bɒks/

Spice box

caja de especias
Meaning
a container used to store various spices and seasonings
Example
She opened the spice box to find cumin for her curry.
Ella abrió la caja de especias para encontrar comino para su curry.
B2 noun /ˈstɔːrɪdʒ/

storage

almacenamiento
Meaning
the action or method of storing something for future use
Example
The warehouse offers plenty of storage space.
El almacén ofrece mucho espacio de almacenamiento.
C1 noun /ˌsəʊʃəˈbɪləti/

sociability

sociabilidad
Meaning
The quality or state of being sociable; friendliness.
Example
Her sociability made her popular in the office.
Su sociabilidad la hizo popular en la oficina.
A2 noun /sɛlf/

self

ser
Meaning
a person's essential being that distinguishes them from others, especially considered as the object of introspection or reflexive action
Example
She has a strong sense of self.
Ella tiene un fuerte sentido del ser.
A2 adjective /skaɪ bluː/

Sky-blue

azul cielo
Meaning
a bright blue color like that of a clear sky
Example
Her sky-blue eyes sparkled in the sunlight.
Sus ojos azul cielo brillaban a la luz del sol.
B1 noun /slaɪd/

Slide

tobogán
Meaning
a smooth surface for sliding down; a piece of playground equipment
Example
The children enjoyed playing on the slide at the park.
Los niños disfrutaron jugando en el tobogán en el parque.
C2 verb /səbˈsjuːm/

subsume

incluir
Meaning
To include or absorb something into a larger group or category.
Example
Minor details were subsumed under the main topic.
Los detalles menores fueron subsumidos bajo el tema principal.
B2 noun /streɪn/

Strain

tensión; presión; agotamiento;
Meaning
pressure or tension; excessive demand on strength or resources
Example
Working long hours put a strain on his health.
Trabajar muchas horas puso una tensión en su salud.
B1 noun /swɒn/

Swan

cisne
Meaning
a large waterbird with a long curved neck and usually white plumage
Example
The elegant swan glided silently across the water.
El elegante cisne se deslizó silenciosamente sobre el agua.
B1 adjective ˈʃɔːrt.tɜːrm

short-term

a corto plazo
Meaning
Occurring over or involving a relatively short period of time.
Example
Investing in stocks can yield short-term profits.
Invertir en acciones puede generar ganancias a corto plazo.
C1 verb /ʃraʊd/

shroud

envolver
Meaning
to cover or hide; to wrap in cloth
Example
The mountain peak was shrouded in mist.
La cima de la montaña estaba envuelta en niebla.
B1 noun /sʌm/

sum

suma
Meaning
the total amount resulting from the addition of two or more numbers or items
Example
The sum of 8 and 12 is 20.
La suma de 8 y 12 es 20.
C1 noun ˈsɪn.tæks

syntax

sintaxis
Meaning
The arrangement of words and phrases to create well-formed sentences in a language.
Example
Programming languages follow strict syntax rules.
Los lenguajes de programación siguen estrictas reglas de sintaxis.
B2 verb /stʌn/

stun

atónito, desconcertado
Meaning
to shock or surprise someone greatly; to knock someone unconscious or dazed
Example
The news of her sudden resignation stunned everyone.
La noticia de su renuncia repentina dejó a todos atónitos.
C1 noun /ˈstɪɡmə/

stigma

estigma
Meaning
a mark of shame or disgrace associated with a particular circumstance or quality
Example
There is still a stigma around mental health issues in many societies.
Todavía existe un estigma en torno a los problemas de salud mental en muchas sociedades.
C2 noun /ˈseɪpiəns/

sapience

sabiduría
Meaning
Wisdom or intelligence.
Example
Her sapience in solving problems earned her the respect of her colleagues.
Su sabiduría para resolver problemas le ganó el respeto de sus colegas.
C1 noun /ˈstɔːrhaʊs/

storehouse

almacén
Meaning
A place where goods, supplies, or valuables are stored; a repository
Example
The warehouse acted as a storehouse for all the imported goods.
El almacén actuaba como un storehouse para todos los productos importados.
A2 noun /ˈstændərd/

standard

estándar
Meaning
a level of quality or achievement, or a measure of comparison
Example
This car meets all the safety standards.
Este coche cumple con todos los estándares de seguridad.
B2 verb /ˈsɪmplɪfaɪ/

simplify

simplificar
Meaning
to make easier to understand or do; to reduce complexity
Example
The teacher simplified the complex equation for the students.
El profesor simplificó la ecuación compleja para los estudiantes.
B2 adjective ˈsɑːləm

solemn

solemne
Meaning
Formal and dignified; characterized by deep sincerity.
Example
The day begins with a solemn ceremony at the memorial.
El día comienza con una solemne ceremonia en el memorial.
C1 noun səˌsɛp.təˈbɪl.ə.ti

susceptibility

susceptibilidad
Meaning
The quality of being likely to be influenced or harmed by a particular thing; vulnerability.
Example
High susceptibility to infections requires extra care.
Alta susceptibilidad a infecciones requiere atención adicional.
C2 adjective /ˈsɪbɪlaɪn/

sibylline

sibila
Meaning
Prophetic, mysterious, or cryptic in meaning.
Example
The old woman gave a sibylline warning about the future.
La anciana dio una advertencia sibila sobre el futuro.
C1 /ʃrɛd/

shred

triturar
Meaning
to tear or cut something into small pieces
Example
She shredded the old documents before throwing them away.
Ella trituró los viejos documentos antes de tirarlos.
C2 adjective /sɪər/

sere

seco
Meaning
Dry or withered, especially vegetation.
Example
The sere leaves crumbled under his feet.
Las hojas secas se desmoronaron bajo sus pies.
B2 noun /sɛnt/

scent

fragancia
Meaning
a distinctive smell, especially a pleasant one
Example
The scent of roses filled the garden.
El aroma de las rosas llenó el jardín.
B2 verb /ˈsɒfən/

soften

suavizar
Meaning
to make or become less hard, severe, or strong.
Example
Heat will soften the butter quickly.
El calor suavizará la mantequilla rápidamente.
B1 noun /ˈʃoʊldər/

Shoulder

hombro
Meaning
the part of the body between the neck and the arm
Example
He carried the bag over his shoulder.
Él llevó la bolsa sobre su hombro.
C1 verb /sʌlk/

sulk

estar enojado
Meaning
to be silent and bad-tempered because you are angry or disappointed
Example
She sulked in her room after the argument.
Ella se enojó en su habitación después de la discusión.
A1 adjective /ʃʊr/

Sure

seguro; ciertamente
Meaning
completely confident that something is true; certain; definitely true
Example
I am sure that he will come tomorrow.
Estoy seguro de que él vendrá mañana.
B2 adverb /ˈsɒftli/

softly

suavemente o tranquilamente
Meaning
in a gentle or quiet way.
Example
She spoke softly so as not to wake the baby.
Ella habló suavemente para no despertar al bebé.
B2 noun /spæm/

spam

spam
Meaning
unsolicited or unwanted electronic communication, typically in the form of email
Example
My inbox is full of spam emails that I need to delete.
Mi bandeja de entrada está llena de correos electrónicos de spam que necesito eliminar.
A2 verb /saɪn/

sign

firmar
Meaning
to write your name on something to show agreement or approval; to make a gesture with meaning
Example
Please sign the contract at the bottom of the page.
Por favor firme el contrato en la parte inferior de la página.
B2 noun /ˈsæŋk.tʃuˌɛr.i/

sanctuary

santuario
Meaning
A place of safety, refuge, or protection; a sacred place.
Example
The forest is a sanctuary for endangered animals.
El bosque es un santuario para los animales en peligro de extinción.
C1 noun səˌfɪs.tɪˈkeɪ.ʃən

sophistication

nivel alto de complejidad o refinamiento
Meaning
High level of complexity or refinement.
Example
The sophistication of modern AI technology is remarkable.
La sofisticación de la tecnología moderna de IA es notable.
A2 noun /ʃiːp/

sheep

oveja
Meaning
a farm animal with thick wool that is raised for its wool, meat, and milk
Example
The farmer keeps a large flock of sheep.
El granjero mantiene un gran rebaño de ovejas.
C1 noun /ˈsɪndɪkət/

syndicate

sindicato
Meaning
A group of individuals or organizations combined to promote a common interest or carry out a business venture.
Example
A syndicate of investors bought the struggling company.
Un sindicato de inversores compró la empresa en apuros.
A1 verb /smaɪl/

smile

sonrisa
Meaning
to express happiness or friendliness by turning the corners of the mouth upwards
Example
She smiled when she saw the gift.
Ella sonrió cuando vio el regalo.
B1 verb /spred/

spread

esparcir
Meaning
to extend over a larger area; to distribute; to apply
Example
The news spread quickly through the town.
La noticia se esparció rápidamente por el pueblo.
B2 adjective /səbˈstæn.ʃəl/

Substantial

sustancial; considerable; importante
Meaning
large in size, amount, or importance; considerable; significant
Example
There was a substantial increase in sales this quarter.
Hubo un aumento sustancial en las ventas de este trimestre.
C1 adjective /ˈsɪn.tɪ.leɪ.tɪŋ/

scintillating

deslumbrante
Meaning
brilliantly clever, exciting, or sparkling
Example
Her scintillating conversation kept everyone entertained.
Su conversación deslumbrante mantuvo a todos entretenidos.
B2 adjective /sɪˈlek.tɪv/

Selective

selectivo
Meaning
relating to or involving careful selection; choosy about what to accept
Example
The university has a selective admission process for new students.
La universidad tiene un proceso selectivo de admisión para los nuevos estudiantes.
C1 noun/verb /ˈsuː.tʃər/

suture

sutura
Meaning
A stitch or row of stitches holding together the edges of a wound or surgical incision.
Example
The doctor used a suture to close the wound.
El doctor usó una sutura para cerrar la herida.
C1 noun səˈlɪnɪti ɪnˈtruːʒən

salinity intrusion

intrusión de salinidad
Meaning
The movement of salt water into freshwater areas, typically affecting coastal regions.
Example
Salinity intrusion affects coastal regions.
La intrusión de salinidad afecta las regiones costeras.
C1 adjective /səˈsɛp.tə.bəl/

susceptible

propenso o vulnerable a ser influenciado o dañado por algo en particular
Meaning
Likely or liable to be influenced or harmed by a particular thing.
Example
Children are more susceptible to infections.
Los niños son más susceptibles a las infecciones.
B2 noun/verb /skræp/

scrap

pedazo / descartar
Meaning
A small piece of something; to discard or get rid of something.
Example
He used a scrap of paper to jot down the number.
Usó un trozo de papel para anotar el número.
B1 verb, adjective /spɛnt/

spent

gastado, agotado
Meaning
Past tense and past participle of 'spend'; also used as an adjective meaning exhausted or used up.
Example
She spent all her energy preparing for the exam.
Ella gastó toda su energía preparándose para el examen.
C2 adjective /sɪmˈfoʊniəs/

symphonious

armonioso
Meaning
Harmonious; producing a pleasant sound or agreement of sound.
Example
The choir's voices were symphonious and filled the hall with beauty.
Las voces del coro eran armoniosas y llenaron la sala de belleza.
C1 noun /ˈstætʃuːt/

statute

ley
Meaning
A written law passed by a legislative body.
Example
The new statute protects workers' rights.
La nueva ley protege los derechos de los trabajadores.
C1 noun ˈsɒv.rɪn.ti

sovereignty

soberanía
Meaning
The authority of a state to govern itself or another state; supreme power or authority.
Example
Sovereignty is essential for a nation's identity.
La soberanía es esencial para la identidad de una nación.
B2 adjective /ˈstuː.di.əs/

Studious

estudioso; dedicado al aprendizaje
Meaning
characterized by diligent study; devoted to learning
Example
She is a studious student who spends hours in the library.
Ella es una estudiante estudiosa que pasa horas en la biblioteca.
C2 adjective /ˈsfɪŋks laɪk/

sphinx-like

misterioso
Meaning
Mysterious, enigmatic, or difficult to interpret
Example
Her sphinx-like smile made it hard to guess what she was thinking.
Su sonrisa de esfinge hacía que fuera difícil adivinar lo que estaba pensando.
B2 noun /səbˈskrɪp.ʃən/

Subscription

suscripción
Meaning
a payment for regular delivery of a service or product; an arrangement to receive something regularly
Example
I canceled my Netflix subscription because I wasn't watching it enough.
Cancelé mi suscripción a Netflix porque no la estaba viendo lo suficiente.
B2 noun /səbˈmɪʃən/

submission

rendición, presentación
Meaning
the act of yielding to authority or presenting something for consideration
Example
Her submission of the report was appreciated by the manager.
Su presentación del informe fue apreciada por el gerente.
B2 verb /ˈstrʌɡlɪŋ/

struggling

luchar
Meaning
Making forceful or violent efforts to get free of restraint or constriction; having difficulty achieving something.
Example
Many regions are struggling with economic recovery.
Muchas regiones están luchando con la recuperación económica.
B2 adjective /swɪft/

swift

rápido
Meaning
moving very quickly; happening promptly
Example
The river current was swift after the heavy rain.
La corriente del río fue rápida después de la intensa lluvia.
C2 adjective /ˌseɪpiˈɛnʃəl/

sapiential

relacionado con la sabiduría
Meaning
Relating to wisdom or knowledge, often in a religious or philosophical sense.
Example
The monk shared sapiential teachings with his students.
El monje compartió enseñanzas relacionadas con la sabiduría con sus estudiantes.
B2 adjective /ˈslɪp.ər.i/

Slippery

resbaladizo
Meaning
smooth and difficult to hold; causing sliding or slipping
Example
The wet floor was very slippery after cleaning.
El suelo mojado estaba muy resbaladizo después de limpiarlo.
C2 adjective /ˈsteɪ.dʒi/

stagy

excesivamente teatral
Meaning
Overly theatrical, artificial, or exaggerated in manner or style.
Example
Her performance felt stagy and unnatural.
Su actuación se sintió excesivamente teatral y antinatural.
C1 adjective /ˈsɛm.ɪ.nəl/

seminal

felicidad
Meaning
Strongly influencing later developments; highly original and influential.
Example
His seminal book changed the course of modern philosophy.
No pudo ocultar su felicidad cuando recibió el premio.
B2 noun /ˈsloʊɡən/

slogan

eslogan
Meaning
a short and memorable phrase used to promote a cause or product
Example
The campaign used a powerful slogan to inspire people.
La campaña utilizó un eslogan poderoso para inspirar a la gente.
B1 noun /ˈspæroʊ/

Sparrow

gorrión
Meaning
small brown and grey bird commonly found in cities and towns
Example
The sparrow chirped cheerfully from the tree branch.
El gorrión cantó alegremente desde la rama del árbol.
B2 noun səˈsteɪnəbl dɪˈvɛləpmənt

Sustainable Development

desarrollo sostenible
Meaning
Development that meets present needs without compromising the ability of future generations to meet their own needs.
Example
Eco-tourism contributes to sustainable development in local communities.
El ecoturismo contribuye al desarrollo sostenible en las comunidades locales.
C2 noun /ʃiːt fɪʃ/

Sheat-fish

siluro
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.
El siluro es uno de los peces de agua dulce más grandes del sur de Asia.
B2 noun /ˈsteɪdiəm/

stadium

estadio
Meaning
a large structure with seating for sports, concerts, or other events
Example
Thousands of fans filled the stadium to watch the final match.
Miles de aficionados llenaron el estadio para ver el partido final.
B2 adjective ˈstrʌktʃərd

structured

estructurado
Meaning
Having a clear organization or framework; systematically arranged.
Example
A structured execution plan is crucial for success.
Un plan de ejecución estructurado es crucial para el éxito.
C2 noun /ˈskæb.ərd/

scabbard

vaina
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.
El caballero sacó su espada de la vaina.
C1 noun /saɪð/

scythe

hoz
Meaning
A tool with a long curved blade used for cutting grass or grain.
Example
The farmer sharpened his scythe before harvesting the wheat.
El agricultor afiló su hoz antes de cosechar el trigo.
C1 noun /ˈsɪstərhʊd/

sisterhood

hermandad
Meaning
The relationship between sisters, or a community of women united by shared experiences or goals.
Example
The feminist movement created a strong sense of sisterhood among women.
El movimiento feminista creó un fuerte sentido de hermandad entre las mujeres.
B2 adverb /ˈsel.fɪʃ.li/

Selfishly

egoístamente
Meaning
in a selfish manner; caring only about oneself
Example
He selfishly took all the cookies.
Él tomó todas las galletas egoístamente.
B1 noun sɪˈlek.ʃən

selection

selección
Meaning
The action or fact of carefully choosing someone or something as being the best or most suitable.
Example
The selection process is based on merit.
El proceso de selección se basa en el mérito.
B1 noun /ˈspɛndɪŋ/

spending

gasto
Meaning
the act of paying money for goods or services
Example
Her spending on clothes was higher than expected.
Su gasto en ropa fue mayor de lo esperado.
C1 noun stɔːrm ɪnˌtensɪfɪˈkeɪʃən

storm intensification

intensificación de la tormenta
Meaning
The process by which storms become stronger and more severe in intensity.
Example
Storm intensification is linked to climate change.
La intensificación de la tormenta está vinculada al cambio climático.
B2 noun /səˈnɛərioʊ/

scenario

situación posible
Meaning
a possible situation or sequence of events
Example
The company prepared for the worst-case scenario.
La empresa se preparó para el peor de los casos.
A2 verb /siːm/

seem

parecer
Meaning
to give the impression of being something or having a particular quality
Example
He seems tired after the long journey.
Parece cansado después del largo viaje.
B2 noun /ˈsaɪd.laɪn/

sideline

actividad secundaria
Meaning
An activity done in addition to one's main job or area of work.
Example
The sideline discussions led to mutual understanding.
Las discusiones secundarias llevaron a una comprensión mutua.
B2 noun /spaɪn/

Spine

columna vertebral; soporte central de una estructura
Meaning
the backbone or vertebral column of a vertebrate; the central support of a structure
Example
She injured her spine in the accident.
Ella se lesionó la columna vertebral en el accidente.
A2 abbreviation (noun/pronoun) /ˈsʌmθɪŋ/

sth.

algo
Meaning
abbreviation for 'something'
Example
Can you give me sth. to write with?
¿Puedes darme algo con qué escribir?
C2 noun /ˈsuːθˌseɪər/

soothsayer

adivino
Meaning
a person who claims to predict the future
Example
The king consulted a soothsayer before going to war.
El rey consultó a un adivino antes de ir a la guerra.
B2 adjective /ˈsɒl.ɪ.ter.i/

Solitary

solitario; aislado; solo
Meaning
alone; without companions; single; isolated
Example
He lived a solitary life in the mountains.
Él vivió una vida solitaria en las montañas.
B2 adjective /ˈsoʊlər/

solar

solar
Meaning
Relating to or determined by the sun
Example
The house is powered by solar energy.
La casa está alimentada por energía solar.
C1 adjective /ˈstʌm.pi/

Stumpy

bajo y grueso
Meaning
short and thick; having a short, thick appearance
Example
The stumpy little dog wagged its tail enthusiastically.
El perrito bajo y grueso movió su cola con entusiasmo.
B2 adjective /ˈspiːtʃləs/

speechless

sin palabras
Meaning
Unable to speak because of shock, surprise, or strong emotion.
Example
She was speechless when she received the award.
Ella se quedó sin palabras cuando recibió el premio.
C1 noun /ˈstæl.i.ən/

stallion

caballo macho para cría
Meaning
An adult male horse that is not castrated, often used for breeding.
Example
The farm owns a powerful stallion for breeding purposes.
La granja posee un caballo macho poderoso para fines de cría.
A2 noun /ˈsɒftweə/

software

software
Meaning
the programs and other operating information used by a computer
Example
He installed the software to enhance the performance of his computer.
Instaló el software para mejorar el rendimiento de su computadora.
C1 verb /snɪp/

snip

cortar
Meaning
to cut something quickly with scissors or a sharp tool
Example
She snipped the loose thread from her dress.
Ella cortó el hilo suelto de su vestido.
C1 adjective /snaɪd/

snide

irónico
Meaning
mocking or insulting in an indirect way
Example
He couldn’t resist making a snide comment about her dress.
No pudo evitar hacer un comentario irónico sobre su vestido.
B2 noun /səˈplaɪə(r)/

supplier

proveedor
Meaning
a person or company that provides goods or services
Example
The supplier delivered the products on time.
El proveedor entregó los productos a tiempo.
B2 noun /ˌsuː.pərˈstɪʃ.ən/

Superstition

superstición
Meaning
a belief or practice considered irrational or supernatural
Example
Breaking a mirror brings seven years of bad luck is a common superstition.
Romper un espejo trae siete años de mala suerte, es una superstición común.
C2 noun /ˈʃæd.ək/

Shaddock

pomelo
Meaning
a large citrus fruit similar to grapefruit; pomelo
Example
The shaddock is the largest citrus fruit in the world.
El shádok es la fruta cítrica más grande del mundo.
B2 adjective /ˈsoʊloʊ/

solo

solo
Meaning
performed by one person alone; a single performance
Example
She decided to perform a solo dance at the talent show.
Decidió hacer un baile solo en el show de talentos.
C1 noun ˈsʌfrɪdʒ

suffrage

sufragio
Meaning
The right to vote in political elections; the principle of political representation.
Example
Universal suffrage was a key demand.
El sufragio universal fue una demanda clave.
C1 adjective /ˈsteɪtli/

stately

majestuoso y digno
Meaning
Having a dignified, majestic, and impressive appearance or manner.
Example
The stately mansion stood at the end of the long driveway.
La majestuosa mansión se encontraba al final del largo camino de entrada.
B2 verb /sɔːr/

soar

elevarse / aumentar rápidamente
Meaning
to fly or rise high in the air; to increase rapidly or dramatically
Example
The eagle soared high above the mountains.
El águila voló alto sobre las montañas.
C1 noun /ˈsaɪd.laɪn dɪˈskʌʃənz/

sideline discussions

discusiones secundarias
Meaning
Informal or secondary conversations that occur outside the main agenda of a formal meeting.
Example
Sideline discussions often lead to agreements.
Las discusiones secundarias a menudo conducen a acuerdos.
B2 noun /ˈsaɪrən/

siren

sirena
Meaning
A device that makes a loud prolonged sound as a signal or warning; in mythology, a creature that lures sailors with enchanting songs.
Example
The police car passed with its siren blaring.
El coche de policía pasó con su sirena sonando.
B2 noun /ˈsɪnθɪsɪs/

synthesis

síntesis, combinación
Meaning
The combination of ideas to form a theory or system.
Example
The synthesis of ideas from multiple perspectives led to innovation.
La síntesis de ideas desde múltiples perspectivas condujo a la innovación.
C2 adjective /ˌsɒfəˈmɒrɪk/

sophomoric

inmaduro
Meaning
showing immaturity and overconfidence, like a sophomore
Example
His sophomoric behavior embarrassed his friends.
Su comportamiento inmaduro avergonzó a sus amigos.
B2 noun ˌsænɪˈteɪʃən

sanitation

saneamiento
Meaning
Conditions relating to public health, especially the provision of clean drinking water and adequate sewage disposal.
Example
Good sanitation practices are key to preventing infestations.
Las buenas prácticas de saneamiento son clave para prevenir infestaciones.
A2 noun /streŋθ/

Strength

fuerza; potencia; fuerza física
Meaning
the quality or state of being physically strong; power or force
Example
Regular exercise helps build muscle strength.
El ejercicio regular ayuda a desarrollar la fuerza muscular.
B1 adjective /ˈsæt.ɪs.fæk.tər.i/

Satisfactory

satisfactorio
Meaning
acceptable; meeting requirements; adequate
Example
The test results were satisfactory.
Los resultados de la prueba fueron satisfactorios.
B2 verb /ˈstreɪtən/

straighten

alisar
Meaning
to make something straight or tidy; to correct or organize
Example
She straightened her hair before the meeting.
Ella se alisó el cabello antes de la reunión.
B1 noun /ˈsaɪdˌwɔːk/

sidewalk

acera
Meaning
a paved path for pedestrians at the side of a street.
Example
Children were playing on the sidewalk.
Los niños estaban jugando en la acera.
B2 noun, verb /stɛm/

stem

tallo / frenar
Meaning
Noun: The main stalk of a plant. Verb: To stop or restrict the flow or development of something.
Example
The gardener cut the stem of the rose; New policies aim to stem the flow of pollution.
El jardinero cortó el tallo de la rosa; Las nuevas políticas buscan frenar el flujo de contaminación.
C2 noun /ˈsɒfɪstri/

sophistry

sofistería
Meaning
the use of clever but false arguments, often to deceive
Example
The politician's speech was full of sophistry.
El discurso del político estaba lleno de sofistería.
B2 noun ˈsʌbstɪˌtut

substitute

sustituto
Meaning
A person or thing acting or serving in place of another.
Example
Money cannot be a substitute for genuine happiness.
El dinero no puede ser un sustituto de la verdadera felicidad.
B2 verb /sɑːb/

sob

sollozar ruidosamente
Meaning
to cry noisily while taking short breaths
Example
She began to sob uncontrollably after hearing the news.
Ella comenzó a sollozar incontrolablemente después de escuchar la noticia.
C2 noun /ˈsfɛrɔɪd/

spheroid

esferoide
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.
La Tierra no es una esfera perfecta sino un esferoide oblato.
C1 adjective /ˈsek.j ə.l ər/

Secular

laico
Meaning
not connected with religious or spiritual matters; worldly
Example
The country maintains a secular government that separates religion from politics.
El país mantiene un gobierno secular que separa la religión de la política.
A1 noun /ˈsekənd/

second

segundo
Meaning
a unit of time equal to one sixtieth of a minute; also the position after first
Example
He finished the race in second place.
Terminó la carrera en segundo lugar.
A2 noun, verb /ʃɒt/

shot

tiro
Meaning
a single attempt to hit something, usually with a weapon or a ball
Example
He took a shot at the goal.
Él tomó un tiro hacia la portería.
B2 noun /ˈsɪmpəθi/

Sympathy

simpatía
Meaning
feelings of pity and sorrow for someone else's misfortune
Example
She expressed her sympathy for the victims of the accident.
Ella expresó su simpatía por las víctimas del accidente.