Sierra Club
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C1 noun /siˈɛrə klʌb/

Sierra Club

Sierra Club
Meaning
An American environmental organization founded in 1892 by John Muir, focused on promoting conservation of the natural environment by influencing public policy decisions.
Example
John Muir founded the Sierra Club in 1892 to protect wild areas.
John Muir fundó el Sierra Club en 1892 para proteger áreas salvajes.
C1 verb /ˈskʌr.i/

scurry

correr rápidamente
Meaning
To move quickly with short, hurried steps.
Example
The mice scurried across the kitchen floor when the lights turned on.
Los ratones corrieron rápidamente por el suelo de la cocina cuando las luces se encendieron.
C1 verb /skwiːl/

squeal

chillar
Meaning
to make a high-pitched cry; to inform on someone
Example
The children squealed with delight when they saw the surprise.
Los niños chillaron de alegría cuando vieron la sorpresa.
C1 adjective /ˈsæljʊˌtɛri/

salutary

saludable
Meaning
Producing good effects; beneficial, especially after something unpleasant.
Example
The accident was a salutary reminder to drive carefully.
El accidente fue un recordatorio saludable de conducir con cuidado.
C1 noun ˌsteɪbəlaɪˈzeɪʃən

stabilization

estabilización
Meaning
The process of making or becoming stable.
Example
The stabilization of the structure was essential after the earthquake.
La estabilización de la estructura fue esencial después del terremoto.
C1 adjective /ˈsted.fæst/

Steadfast

firme; resuelto; inquebrantable
Meaning
firm in belief, determination, or adherence; unwavering
Example
She remained steadfast in her commitment to helping the poor.
Ella permaneció firme en su compromiso de ayudar a los pobres.
C1 adjective /səˈdʒɛstɪv/

suggestive

sugestivo
Meaning
tending to suggest ideas or images; sometimes implies something sexual or provocative
Example
The painting was highly suggestive and sparked much debate.
La pintura era muy sugestiva y provocó mucho debate.
C1 adjective /ˈsaɪz.mɪk/

seismic

sísmico
Meaning
Relating to earthquakes or vibrations of the earth and its crust.
Example
The region is known for its seismic activity.
La región es conocida por su actividad sísmica.
C1 noun /sɔːd fɪʃ/

Sword fish

pez espada
Meaning
A large marine fish with an elongated bill resembling a sword
Example
The swordfish can swim at speeds up to 60 mph.
El pez espada puede nadar a velocidades de hasta 60 mph.
C1 noun /ˈsɪməli/

simile

símil
Meaning
A figure of speech involving the comparison of one thing with another using 'like' or 'as'.
Example
She used a simile to describe her eyes as bright as stars.
Ella usó un símil para describir sus ojos tan brillantes como las estrellas.
C1 adjective /ˈsaɪt.ləs/

Sightless

ciego; sin visión
Meaning
unable to see; blind; lacking vision
Example
The sightless man navigated the street with his guide dog.
El hombre ciego navegó por la calle con su perro guía.
C1 noun /ˈstaɪpend/

Stipend

subsidio
Meaning
a fixed regular sum paid as a salary or allowance
Example
The research student receives a monthly stipend for living expenses.
El estudiante de investigación recibe un estipendio mensual para sus gastos de vida.
C1 noun /səbˈmɜːrdʒəns/

submergence

inmersión
Meaning
the act or process of being submerged or going underwater
Example
The submergence of coastal areas is a major concern due to rising sea levels.
La inmersión de las áreas costeras es una preocupación importante debido al aumento del nivel del mar.
C1 noun /ˈsaɪnəs/

sinus

seno
Meaning
A cavity within a bone or tissue, especially those in the bones of the face connected with the nasal cavities.
Example
He suffered from a sinus infection that caused headaches.
Él sufrió de una infección sinusal que le causó dolor de cabeza.
C1 adjective ˌsɪn.əˈdʒɪs.tɪk

synergistic

sinérgico
Meaning
Relating to the interaction of elements that when combined produce a greater effect than the sum of their individual effects.
Example
A synergistic effect occurs when nutrients work together.
Un efecto sinérgico ocurre cuando los nutrientes trabajan juntos.
C1 noun /ˈseɪɑːns/

seance

sesión espiritista
Meaning
A meeting where people attempt to communicate with the spirits of the dead.
Example
They held a seance to contact their late grandmother.
Celebraron una sesión espiritista para contactar a su abuela fallecida.
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.
C1 adjective /ˈsliːzi/

sleazy

de mala calidad, inmoral o barato
Meaning
morally low, dirty, or cheap in quality
Example
He avoided the sleazy nightclub downtown.
Él evitó el club nocturno sórdido en el centro.
C1 verb /sɪˈkriːt/

secrete

secreción
Meaning
to produce and release a substance from a cell, gland, or organ
Example
The pancreas secretes insulin to regulate blood sugar levels.
El páncreas secreta insulina para regular los niveles de azúcar en la sangre.
C1 noun /ʃruː/

shrew

mujer irritable / animal parecido a un ratón
Meaning
a small mouse-like animal; also a woman with a bad temper
Example
The play describes a strong-willed woman as a shrew.
La obra describe a una mujer de voluntad fuerte como una mujer irritable.
C1 adjective /suːˈpɜːr.flu.əs/

superfluous

superfluo
Meaning
Unnecessary, especially through being more than enough.
Example
His speech contained too many superfluous details.
Su discurso contenía demasiados detalles superfluos.
C1 noun ˈsæŋktɪti

sanctity

santidad
Meaning
The state or quality of being holy, sacred, or saintly; ultimate importance.
Example
The sanctity of life should never be compromised.
La santidad de la vida nunca debe ser comprometida.
C1 adjective /spɑːrs/

sparse

escaso
Meaning
thinly scattered or distributed; not dense or abundant
Example
Vegetation was sparse in the desert.
La vegetación era escasa en el desierto.
C1 noun /straɪf/

strife

conflicto, lucha
Meaning
angry or violent conflict; struggle or discord
Example
The region has been torn apart by political strife.
La región ha sido desgarrada por el conflicto político.
C1 adjective /ˈstrɛnjuəs/

strenuous

arduo
Meaning
Requiring or using great effort and energy.
Example
Climbing the mountain was a strenuous task.
Escalar la montaña fue una tarea ardua.
C1 verb /ˌsuːpərɪmˈpoʊz/

superimpose

superponer
Meaning
to place one thing on top of another so that both can be seen
Example
The editor superimposed text over the image.
El editor superpuso texto sobre la imagen.
C1 noun /sɛkt/

sect

secta
Meaning
a subgroup of a larger religious or political group, often with differing beliefs
Example
The group split into different sects due to doctrinal differences.
El grupo se dividió en diferentes sectas debido a las diferencias doctrinales.
C1 verb ˈsɪn.ɚ.dʒaɪz

synergize

sinergizar, combinar de manera que aumente la efectividad.
Meaning
combine in such a way as to enhance effectiveness.
Example
The departments must synergize to improve efficiency.
Los departamentos deben sinergizar para mejorar la eficiencia.
C1 noun /stents/

stents

stents
Meaning
Small mesh tubes used to treat narrow or blocked arteries.
Example
Stents were successfully placed using robotic techniques.
Los stents fueron colocados con éxito utilizando técnicas robóticas.
C1 adjective /ˈʃeɪm.ləs/

Shameless

desvergonzado
Meaning
having no shame; bold and rude; impudent
Example
The shameless politician refused to apologize for his mistakes.
El político desvergonzado se negó a disculparse por sus errores.
C1 verb /ˈstrætɪfaɪ/

stratify

estratificar
Meaning
to arrange or divide into layers, classes, or categories
Example
The researchers plan to stratify the data based on age groups.
Los investigadores planean estratificar los datos según los grupos de edad.
C1 adjective /ˈsɒljʊbəl/

soluble

soluble
Meaning
able to be dissolved, especially in water
Example
Sugar is soluble in water.
El azúcar es soluble en agua.
C1 noun /ˈspiːʃiː/

specie

moneda
Meaning
money in the form of coins rather than notes or credit
Example
The transaction was made in specie.
La transacción se hizo en monedas.
C1 verb /stoʊk/

stoke

avivar el fuego; fomentar o aumentar un sentimiento o actividad fuerte
Meaning
To add fuel to a fire; to encourage or increase a strong feeling or activity.
Example
The politician’s speech stoked anger among the crowd.
El discurso del político encendió la ira entre la multitud.
C1 noun /ʃraɪn/

Shrine

santuario; templo; lugar sagrado
Meaning
a holy or sacred place dedicated to a specific deity, ancestor, hero, or saint
Example
Pilgrims visit the shrine to pray for good health.
Los peregrinos visitan el santuario para rezar por buena salud.
C1 noun /səˈrɛn.ɪ.ti/

serenity

serenidad
Meaning
The state of being calm, peaceful, and untroubled.
Example
Meditation helps in achieving inner serenity.
La meditación ayuda a alcanzar la serenidad interior.
C1 adjective /sɪmˈplɪstɪk/

simplistic

excesivamente simplificado
Meaning
treating complex issues as if they were much simpler than they really are
Example
His explanation was too simplistic and ignored key details.
Su explicación fue demasiado simplificada e ignoró detalles clave.
C1 adjective /ʃruːd/

Shrewd

astuto; inteligente; perspicaz
Meaning
having or showing sharp powers of judgment; astute
Example
The shrewd businessman made a profitable deal in the competitive market.
El astuto hombre de negocios hizo un trato rentable en el mercado competitivo.
C1 noun /ˈstɪmjʊlənt/

stimulant

estimulante
Meaning
A substance that raises levels of physiological or nervous activity in the body.
Example
Coffee is a common stimulant that helps people stay awake.
El café es un estimulante común que ayuda a las personas a mantenerse despiertas
C1 noun /ˈsɑːri/

Saree

sari
Meaning
a garment consisting of a length of cotton or silk elaborately draped around the body, traditionally worn by women from South Asia
Example
She looked elegant in her red silk saree at the festival.
Ella lucía elegante con su sari de seda roja en el festival.
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.
C1 noun /ˌsɪmbɪˈəʊsɪs/

symbiosis

relación simbiótica
Meaning
A mutually beneficial relationship between different people or groups.
Example
The symbiosis between the two companies led to mutual growth.
La simbiosis entre las dos empresas llevó a un crecimiento mutuo.
C1 adjective /ˈsæk.rəˌsæŋkt/

sacrosanct

sacrosonante
Meaning
Regarded as too important or valuable to be interfered with; sacred.
Example
Freedom of speech is considered sacrosanct in democratic societies.
La libertad de expresión se considera sacrosanta en las sociedades democráticas.
C1 noun ˌsɪstəˈmætɪk ˈseɪvɪŋz

systematic savings

ahorros sistemáticos
Meaning
A structured and organized approach to regularly saving money according to a planned schedule
Example
Systematic savings can mitigate financial crises in old age.
Los ahorros sistemáticos pueden mitigar las crisis financieras en la vejez.
C1 verb /skʌf/

scuff

rasguñar
Meaning
to mark or scratch the surface of something by rubbing
Example
He scuffed his shoes on the pavement.
Él rasguñó sus zapatos en la acera.
C1 verb ˈsɪn.θə.saɪ.zɪŋ

synthesizing

sintetizar, combinar, presentar de forma coherente
Meaning
Combine (a number of things) into a coherent whole.
Example
He excels in synthesizing ideas from different sources.
Él sobresale en sintetizar ideas de diferentes fuentes.
C1 adjective /ˈskrʌmpʃəs/

scrumptious

exquisito
Meaning
extremely tasty or delicious
Example
She baked a scrumptious chocolate cake for the party.
Ella horneó un exquisito pastel de chocolate para la fiesta.
C1 noun /ˈsɒlstɪs/

solstice

solsticio
Meaning
the two times in the year when the sun is at its greatest distance from the equator (summer and winter solstice)
Example
People celebrate the summer solstice with festivals and rituals.
La gente celebra el solsticio de verano con festivales y rituales.
C1 verb /siːð/

seethe

hirviendo de rabia
Meaning
To be filled with intense but unexpressed anger or agitation.
Example
She was seething with anger after the unfair decision.
Ella estaba hirviendo de rabia después de la decisión injusta.
C1 adjective /suːˈpɜːrlətɪv/

superlative

superlativo
Meaning
Of the highest quality or degree; expressing the extreme form of an adjective or adverb.
Example
Her performance was superlative, earning her a standing ovation.
Su desempeño fue superlativo, ganándose una ovación de pie.
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 /ˈspeɪʃəl/

spatial

espacial
Meaning
relating to space or the position, area, and size of things
Example
The scientist studied the spatial arrangement of stars.
El científico estudió la disposición espacial de las estrellas.
C1 noun /ˌsɑːrdʒənt ˈmeɪdʒər/

sergeant-major

sargento-mayor
Meaning
A senior non-commissioned officer in the army responsible for discipline and administration within a unit.
Example
The sergeant-major inspected the troops before the parade.
El sargento-mayor inspeccionó a las tropas antes del desfile.
C1 adjective /ˈstrætɪfaɪd/

stratified

estratificado
Meaning
arranged or classified in layers or strata
Example
Society in the past was highly stratified based on class and wealth.
La sociedad en el pasado estaba altamente estratificada según la clase y la riqueza.
C1 verb /ˈsælvɪdʒ/

salvage

salvar
Meaning
To save something from loss, damage, or destruction.
Example
They managed to salvage some goods from the fire.
Lograron salvar algunos bienes del incendio.
C1 verb /ˈskaʊər/

scour

fregar / buscar exhaustivamente
Meaning
to clean or brighten the surface of something by scrubbing; to search thoroughly
Example
She scoured the kitchen until it shone.
Ella fregó la cocina hasta que brilló.
C1 verb /siːp/

seep

filtrarse lentamente
Meaning
to flow or leak slowly through small openings or pores
Example
Water began to seep through the cracks in the wall.
El agua comenzó a filtrarse a través de las grietas en la pared.
C1 noun səˈsteɪnəbəl ˈpræktɪsɪz

sustainable practices

prácticas sostenibles
Meaning
Methods and activities that can be maintained over time without depleting natural resources or harming the environment.
Example
Sustainable practices are vital for environmental preservation.
Las prácticas sostenibles son vitales para la preservación del medio ambiente.
C1 noun/verb /skɜːrdʒ/

scourge

maldición / flagelo
Meaning
A source of great pain or punishment; to whip or inflict suffering on someone.
Example
Disease and poverty remain a scourge in many regions.
La enfermedad y la pobreza siguen siendo una maldición en muchas regiones.
C1 adjective /ˈstɔːlwərt/

stalwart

firme, leal
Meaning
Loyal, reliable, and hardworking; strongly built or sturdy.
Example
She has always been a stalwart supporter of the community.
Ella siempre ha sido una firme defensora de la comunidad.
C1 noun /ˌsɛlfsəˈfɪʃənsi/

Self-sufficiency

autosuficiencia
Meaning
the ability to supply one's own needs without external assistance; independence
Example
The farm achieved complete self-sufficiency in food production.
La granja logró la autosuficiencia completa en la producción de alimentos.
C1 noun /sɪlk klɔːθ/

Silk cloth

tela de seda
Meaning
fabric made from natural fibers produced by silkworms
Example
The bride wore a beautiful dress made of silk cloth.
La novia llevaba un hermoso vestido hecho de tela de seda.
C1 verb /skɔːrtʃ/

scorch

quemar
Meaning
to burn the surface of something slightly
Example
The fire scorched the walls of the building.
El fuego quemó las paredes del edificio.
C1 verb /ˈskwɒndər/

squander

malgastar
Meaning
to waste money, time, or opportunities in a careless way
Example
He squandered his inheritance on gambling.
Él malgastó su herencia en juegos de azar.
C1 noun /səˈbraɪəti/

sobriety

sobriedad
Meaning
the state of being sober; self-restraint and seriousness
Example
He has maintained his sobriety for five years.
Ha mantenido su sobriedad durante cinco años.
C1 verb/noun /snɑːrl/

snarl

gruñido, atasco
Meaning
to growl aggressively with bared teeth; a tangle or mess
Example
The dog snarled at the stranger near the gate.
El perro gruñó al extraño cerca de la puerta.
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.
C1 verb /skɪmp/

skimp

escatimar
Meaning
to use less of something than is necessary in order to save money or effort
Example
Don’t skimp on quality when buying a new laptop.
No escatimes en calidad al comprar una nueva laptop.
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 /stɑːr ˈæn.ɪs/

Star Anise

anís estrellado
Meaning
star-shaped spice pod with a licorice-like flavor used in cooking
Example
She added star anise to the soup for aromatic flavor.
Ella agregó anís estrellado a la sopa para darle un sabor aromático.
C1 noun /ˈsmætərɪŋ/

smattering

conocimiento superficial
Meaning
A small amount or superficial knowledge of something.
Example
He has a smattering of Spanish.
Él tiene un conocimiento superficial de español.
C1 /splɪnt/

splint

férula
Meaning
A rigid device used to support and immobilize a broken or injured body part.
Example
The doctor applied a splint to stabilize the patient's broken arm.
El doctor aplicó una férula para estabilizar el brazo roto del paciente.
C1 adjective /ˈsaʊnd.pruːf/

Sound-proof

a prueba de sonido; que evita que el sonido entre o salga
Meaning
impervious to sound; preventing sound from entering or leaving
Example
The recording studio has sound-proof walls.
El estudio de grabación tiene paredes a prueba de sonido.
C1 adjective /ˈsɛn.sər.i/

sensory

sensorial
Meaning
Related to the five human senses (sight, hearing, taste, touch, smell).
Example
Sensory feedback enhances the VR experience.
La retroalimentación sensorial mejora la experiencia de VR.
C1 verb /snʌb/

snub

despreciar
Meaning
to insult or ignore someone by treating them rudely
Example
He felt hurt when his invitation was snubbed.
Él se sintió herido cuando su invitación fue despreciada.
C1 noun ˌsɪs.təˈmæt.ɪk ˈstræt.ə.dʒi

systematic strategy

estrategia sistemática
Meaning
A methodical and organized plan or approach to achieve specific objectives.
Example
A systematic strategy was employed to achieve objectives.
Se empleó una estrategia sistemática para alcanzar los objetivos.
C1 verb /slɪŋ/

sling

colgar, lanzar
Meaning
to throw or hang something roughly or carelessly
Example
He slung his bag over his shoulder before leaving.
Él colgó su bolso sobre su hombro antes de salir.
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.
C1 verb /ˈsætəˌraɪz/

satirize

satirizar
Meaning
to mock or criticize something using satire
Example
The play satirizes the greed of modern corporations.
La obra satiriza la codicia de las corporaciones modernas.
C1 adjective /ˈskeɪðɪŋ/

scathing

crítica mordaz
Meaning
severely critical; harshly scornful
Example
The critic wrote a scathing review of the movie.
El crítico escribió una crítica mordaz de la película.
C1 verb /ʃɪə/

shear

cortar
Meaning
to cut the wool off a sheep or to cut something with sharp tools like scissors or shears
Example
The farmer will shear the sheep in the spring.
El agricultor sheará la oveja en la primavera.
C1 verb /sɪndʒ/

singe

quemar ligeramente
Meaning
To burn something superficially or lightly, especially at the edges.
Example
The fire singed his eyebrows.
El fuego le quemó las cejas.
C1 noun, adjective /ˈsɒlvənt/

solvent

disolvente, capaz de pagar deudas
Meaning
a liquid that dissolves other substances; also means able to pay debts
Example
Acetone is a common solvent used in laboratories.
El acetona es un disolvente común usado en laboratorios.
C1 noun /streɪt/

strait

estrecho
Meaning
A narrow passage of water connecting two seas or two large areas of water.
Example
The Strait of Gibraltar connects the Atlantic Ocean and the Mediterranean Sea.
El estrecho de Gibraltar conecta el océano Atlántico y el mar Mediterráneo.
C1 verb /ˈstɪntɪŋ/

stinting

dar con tacañería
Meaning
to supply sparingly or with restrictions
Example
He never stinting his efforts to help the poor.
Él nunca escatima esfuerzos para ayudar a los pobres.
C1 adjective /ˈstoʊɪk/

stoic

estoico, imperturbable
Meaning
Showing little or no emotion, even in difficult situations.
Example
She remained stoic during the crisis, never showing fear or panic.
Ella permaneció estoica durante la crisis, sin mostrar miedo ni pánico.
C1 adjective /ˌsekənd ˈreɪt/

second-rate

de segunda categoría
Meaning
Of mediocre or inferior quality.
Example
The movie was entertaining but clearly second-rate compared to the original.
La película fue entretenida, pero claramente de segunda categoría en comparación con la original.
C1 verb /səbˈsaɪd/

subside

disminuir
Meaning
to become less intense, violent, or severe; to sink or fall to a lower level
Example
After the storm, the floodwaters began to subside.
Después de la tormenta, las aguas de la inundación comenzaron a disminuir.
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 /stɪˈlɛtoʊ/

stiletto

zapato de tacón delgado / daga
Meaning
A small, thin, high-heeled shoe or a dagger with a slender blade.
Example
She wore elegant stiletto heels to the party.
Ella llevaba unos elegantes tacones stilettos a la fiesta.
C1 verb /ˈskævɪndʒ/

scavenge

buscar entre la basura
Meaning
to search through waste or discarded material to find useful items
Example
The children scavenged for food in the garbage dump.
Los niños scavengaron para encontrar comida en el basurero.
C1 adjective sɪˈmæn.tɪk

semantic

relacionado con el significado en el lenguaje
Meaning
Related to meaning in language; concerning the interpretation of words and sentences.
Example
AI models use semantic analysis to understand context.
Los modelos de IA utilizan análisis semántico para entender el contexto.
C1 verb /ˈsɪnɚdʒaɪzd/

synergized

sincronizado, energizado, coordinado
Meaning
Combine in such a way that the total effect is greater than the sum of the individual effects.
Example
The teams were synergized to maximize productivity.
Los equipos fueron sincronizados para maximizar la productividad.
C1 noun /ˈsɛdətɪv/

sedative

sedante
Meaning
A substance that calms the nerves or induces sleep.
Example
The doctor prescribed a sedative to help the patient sleep.
El doctor recetó un sedante para ayudar al paciente a dormir.
C1 verb /skwɪnt/

squint

entrecerrar los ojos
Meaning
to look with partly closed eyes
Example
She squinted at the bright sunlight.
Ella entrecerró los ojos por la luz brillante del sol.
C1 adjective /ˌsækrəˈlɪdʒəs/

sacrilegious

sacrílego
Meaning
Showing disrespect or irreverence toward something sacred.
Example
The painting was criticized as being sacrilegious.
La pintura fue criticada por ser sacrílega.
C1 adjective /ˈsɒnɪk/

sonic

sonico
Meaning
Relating to or involving sound waves or speed of sound.
Example
The jet created a loud boom when it broke the sonic barrier.
El jet creó un fuerte estruendo cuando rompió la barrera sónica.
C1 verb /ˈsʌkɪŋ/

sucking

chupar
Meaning
Drawing in a liquid, air, or other substance through the mouth or a tube by creating a vacuum; also used figuratively for something unpleasant or ineffective
Example
The baby is sucking on a pacifier.
El bebé está chupando un chupete.
C1 noun /slæb/

slab

losa
Meaning
a large, thick, flat piece of stone, concrete, or other hard material
Example
The workers laid a concrete slab for the foundation.
Los trabajadores colocaron una losa de concreto para la fundación.
C1 noun /ˈsɔːjər/

Sawyer

aserrador
Meaning
a person who saws wood, especially as an occupation
Example
The skilled sawyer cut the logs into planks.
El hábil aserrador cortó los troncos en tablones.
C1 verb /ˈstriːmlaɪnɪŋ/

streamlining

simplificación
Meaning
The process of making an organization or system more efficient by simplifying or eliminating unnecessary steps
Example
Streamlining processes can significantly reduce operational costs.
La simplificación de procesos puede reducir significativamente los costos operacionales.
C1 noun səˈsteɪ.nə.bəl tekˈnɒl.ə.dʒi

sustainable technology

tecnología sostenible
Meaning
Technology designed to meet present needs without compromising future generations' ability to meet their needs.
Example
Sustainable technology ensures a cleaner future.
La tecnología sostenible garantiza un futuro más limpio.
C1 adjective /ˈsɪm.jʊ.leɪ.tɪd/

simulated

simulado
Meaning
Artificially created to look real but not actually real.
Example
The pilot trained in a simulated flight environment.
El piloto entrenó en un ambiente de vuelo simulado.
C1 noun /ˈskeɪ.biːz/

Scabies

sarna
Meaning
a contagious skin disease caused by mites that causes intense itching
Example
The doctor diagnosed him with scabies after examining the rash.
El doctor le diagnosticó sarna después de examinar la erupción.
C1 adjective /ˈsɪnləs/

Sinless

sin pecado; inocente; puro
Meaning
free from sin; pure and innocent; without moral fault
Example
The innocent child appeared sinless in her pure white dress.
La niña inocente apareció sin pecado con su vestido blanco puro.
C1 verb /sərˈmaʊnt/

surmount

superar
Meaning
to overcome a difficulty or obstacle
Example
He surmounted all the challenges to achieve his dream.
Él superó todos los desafíos para lograr su sueño.
C1 noun /ˈspɛkjʊˌleɪtər/

speculator

especulador
Meaning
A person who forms theories without evidence, or invests in assets hoping for profit.
Example
The real estate speculator bought land hoping its value would rise.
El especulador de bienes raíces compró tierras con la esperanza de que su valor aumentaría.
C1 adjective /ˈsɒmbər/

somber

sombrío
Meaning
Dark or dull in color or tone; gloomy or serious.
Example
The funeral had a somber atmosphere.
El funeral tenía un ambiente sombrío.
C1 noun /speɪt/

spate

oleada
Meaning
a large number of things occurring in quick succession
Example
There has been a spate of robberies in the city.
Ha habido una oleada de robos en la ciudad.
C1 adjective /sɪˈnɒnɪməs/

synonymous

sinónimo
Meaning
having the same or nearly the same meaning; closely associated with something
Example
For many people, her name is synonymous with generosity.
Para muchas personas, su nombre es sinónimo de generosidad.
C1 verb/noun /ˈsɒldər/

solder

soldar
Meaning
To join metal parts together by melting and putting a filler metal into the joint
Example
He soldered the broken wires back together.
Él soldó los cables rotos de nuevo.
C1 noun /ˈskaɪ.lɑːrk/

Sky-Lark

alondra
Meaning
a small brown bird known for singing while flying high in the sky
Example
The skylark sang beautifully as it soared above the meadow.
La alondra cantó hermosamente mientras se elevaba sobre el prado.
C1 verb /sərˈmaɪz/

surmise

suponer
Meaning
to suppose something is true without having evidence
Example
She surmised that he was not coming to the meeting.
Ella supuso que él no iba a venir a la reunión.
C1 verb/noun /skaʊl/

scowl

fruncir el ceño
Meaning
To frown in an angry or bad-tempered way.
Example
She scowled when she heard the unfair remark.
Ella frunció el ceño cuando escuchó el comentario injusto.
C1 adjective /smʌɡ/

smug

presumido
Meaning
having or showing an excessive pride in oneself or one's achievements
Example
He wore a smug smile after winning the debate.
Llevaba una sonrisa presuntuosa después de ganar el debate.
C1 noun /ˈstɪklər/

stickler

persona estricta con las normas
Meaning
a person who insists on a certain quality or standard of behavior
Example
He is a stickler for punctuality and never tolerates delays.
Él es muy estricto con la puntualidad y no tolera retrasos.
C1 noun /ˈsteɪl.meɪt/

stalemate

empate
Meaning
A situation in which no progress can be made or no party can win.
Example
Negotiations ended in a stalemate.
Las negociaciones terminaron en un empate.
C1 adjective /ˈsɛnʃənt/

sentient

sensible
Meaning
Able to perceive or feel things.
Example
Humans are sentient beings capable of reasoning.
Los humanos son seres sentientes capaces de razonar.
C1 adjective, verb /sɪˈdeɪt/

sedate

sedar
Meaning
calm, quiet, and composed; or to administer a drug to make someone calm or sleep
Example
The nurse sedated the patient before the operation.
La enfermera sedó al paciente antes de la operación.
C1 noun /səbˈvɜːrʒən/

subversion

subversión
Meaning
the act of trying to destroy or undermine an established system or authority
Example
The government accused the rebels of planning subversion.
El gobierno acusó a los rebeldes de planear una subversión.
C1 noun /ˈsɜːrəɡət/

surrogate

sustituto
Meaning
A substitute, especially a person deputizing for another in a specific role or office.
Example
The surrogate mother gave birth to the child after carrying it for nine months.
La madre sustituta dio a luz al niño tras llevarlo durante nueve meses.