summation
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C1 noun /sʌˈmeɪʃən/

summation

suma, resumen
Meaning
The process of adding things together; a summary of points.
Example
The lawyer gave a powerful summation of the case.
El abogado dio un poderoso resumen del caso.
B2 noun /sneɪl/

Snail

caracol
Meaning
a small soft creature with a shell on its back that moves very slowly
Example
The snail left a shiny trail as it crawled across the leaf.
El caracol dejó un rastro brillante mientras se arrastraba por la hoja.
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.
C1 adjective /ˈʃɪp.ʃeɪp/

Shipshape

ordenado; bien organizado; en buen estado
Meaning
neat and tidy; in good order; well-organized
Example
Everything was shipshape before the inspection.
Todo estaba en perfecto estado antes de la inspección.
B2 noun /skwɒd/

squad

escuadra
Meaning
a small group of people organized for a specific purpose or task, often in the military or sports
Example
The football squad trained hard before the championship match.
El equipo de fútbol entrenó duro antes del partido de campeonato.
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.
C2 adjective /ˈsæ.loʊ/

sallow

amarillo pálido
Meaning
Of an unhealthy yellow or pale brown color, often referring to skin.
Example
His sallow complexion made him look tired and sickly.
Su complexión amarilla pálida lo hacía parecer cansado y enfermo.
B1 noun ˈstrætədʒi

strategy

estrategia
Meaning
A plan of action designed to achieve a long-term or overall aim.
Example
The strategy ensured success.
La estrategia aseguró el éxito.
C2 noun /spʌndʒ ɡɔːrd/

Sponse gourd

calabaza esponjosa
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.
La calabaza esponjosa puede comerse cuando está joven o secarse para hacer estropajos naturales.
B1 noun /stæf/

staff

personal
Meaning
a group of employees working together in an organization
Example
The staff at the hospital are very helpful.
El personal en el hospital es muy servicial.
C1 noun ˌsɛlf.rɪˈstreɪnt

self-restraint

autocontrol
Meaning
The practice of restraining oneself from indulging in something, typically an impulse or desire.
Example
Practicing self-restraint helps in avoiding impulsive decisions.
Practicar el autocontrol ayuda a evitar decisiones impulsivas.
A2 noun ˈsaɪən.tɪst

scientist

científico
Meaning
A person who is studying or has expert knowledge of one or more of the natural or physical sciences.
Example
The scientist proposed data-driven reforms.
El científico propuso reformas basadas en datos.
B1 noun /ˌsaʊθˈiːst/

southeast

sureste
Meaning
the direction that is between south and east; a region in that direction
Example
The city is located in the southeast of the country.
La ciudad está ubicada en el sureste del país.
B2 noun ˈsæt.əl.aɪt

satellite

satélite
Meaning
An artificial object which has been intentionally placed into orbit around a celestial body.
Example
Satellites provide critical data for research.
Los satélites proporcionan datos críticos para la investigación.
A1 noun /snoʊ/

Snow

felicidad
Meaning
white frozen water that falls from clouds as soft flakes
Example
The children played happily in the fresh snow.
Ella no pudo ocultar su felicidad cuando recibió el premio.
A2 noun, verb, adjective /saʊnd/

sound

sonido
Meaning
a sensation perceived by the ear; to make or cause to make a noise; in good condition
Example
The bell sounded across the valley.
La campana sonó a través del valle.
A2 noun /ˈstreɪndʒər/

Stranger

extraño
Meaning
a person whom one does not know or with whom one is not familiar
Example
Never take candy from a stranger.
Nunca tomes dulces de un extraño.
B2 noun /ˈsʌm.ɪt/

summit

cumbre
Meaning
A high-level meeting between leaders, especially of governments; a conference.
Example
The summit addressed pressing global issues.
La cumbre abordó cuestiones globales urgentes.
B2 adjective, noun /ˈsɪŋɡjələr/

singular

extraordinario / singular
Meaning
Remarkable, extraordinary; or grammatical form referring to one person or thing.
Example
She has a singular talent for painting.
Ella tiene un talento extraordinario para la pintura.
C1 adjective /ˈspɑːrtn/

spartan

espartano
Meaning
showing simplicity and lack of luxury; austere
Example
He lived in a spartan room with just a bed and a chair.
Vivió en una habitación espartana con solo una cama y una silla.
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 verb /ˈsnɪkər/

snicker

reírse disimuladamente
Meaning
to laugh quietly in a disrespectful or mocking way
Example
The students snickered when the teacher made a mistake.
Los estudiantes se rieron cuando el maestro cometió un error.
B2 verb /ˈsʌfəkeɪt/

suffocate

asfixiar
Meaning
to cause someone to die or have difficulty breathing by depriving them of air
Example
The child nearly suffocated when trapped in the locked room.
El niño casi se asfixió cuando quedó atrapado en la habitación cerrada.
B2 verb ˈsiːlɪŋ

sealing

sellar, cerrar
Meaning
The action of closing or blocking something to prevent entry or escape.
Example
Sealing cracks in the walls can prevent pests from entering.
Sellar las grietas en las paredes puede evitar que las plagas entren.
C2 adjective /ˈsækərɪn/

saccharine

felicidad
Meaning
Excessively sweet or sentimental.
Example
His saccharine smile seemed insincere.
No pudo ocultar su felicidad cuando recibió el premio.
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.
B2 adjective sɪˈvɪər

severe

grave
Meaning
Very great; intense or extreme in degree.
Example
Without action, climate change impacts will become severe.
Sin acción, los impactos del cambio climático serán graves.
B1 adverb /ˈspeʃ.əl.i/

Specially

especialmente
Meaning
for a particular purpose; especially; specifically
Example
This gift was specially made for you.
Este regalo fue hecho especialmente para ti.
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.
B2 noun /sɪmˈplɪsɪti/

Simplicity

simplicidad; claridad
Meaning
the quality of being simple; lack of complexity or intricacy
Example
The beauty of the design lies in its simplicity.
La belleza del diseño radica en su simplicidad.
C1 verb /smɜrk/

smirk

sonreír con suficiencia
Meaning
to smile in a self-satisfied, smug, or silly way
Example
He smirked when he won the argument.
Él sonrió cuando ganó la discusión.
B1 verb /stretʃ/

stretch

estirar
Meaning
to extend or expand; to make or become longer or wider
Example
Athletes stretch their muscles before exercising.
Los atletas estiran sus músculos antes de ejercitarse.
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.
B2 adjective ˈsiːm.ləs

seamless

sin interrupciones
Meaning
A process or service that works without any interruption.
Example
A seamless checkout process improves user satisfaction.
Un proceso de pago sin interrupciones mejora la satisfacción del usuario.
B2 verb /straɪd/

stride

caminar con pasos largos y decisivos; hacer progresos
Meaning
to walk with long, decisive steps; to make progress
Example
She strode confidently across the stage.
Ella caminó con confianza por el escenario.
C1 noun /ˈsɪləbəl/

syllable

sílaba
Meaning
A unit of pronunciation having one vowel sound, with or without surrounding consonants, forming the whole or part of a word.
Example
The word 'computer' has three syllables.
La palabra 'computadora' tiene tres sílabas.
A2 adjective /ˈsʌdən/

Sudden

repentino; abrupto; inesperado;
Meaning
happening or done quickly and unexpectedly; abrupt
Example
There was a sudden change in the weather.
Hubo un cambio repentino en el clima.
B1 noun /ˈʃel.tər/

Shelter

refugio
Meaning
a place giving temporary protection from bad weather or danger
Example
The hikers found shelter in a cave during the heavy rain.
Los excursionistas encontraron refugio en una cueva durante la fuerte lluvia.
B1 adverb /ˈʃɔːt.li/

Shortly

pronto; en breve; brevemente
Meaning
soon; in a short time; briefly
Example
The meeting will begin shortly.
La reunión comenzará pronto.
B2 noun ˌsensɪˈtɪvɪti

sensitivity

sensibilidad
Meaning
The quality or condition of being sensitive; responsiveness to stimuli.
Example
Bose proved plant sensitivity through experiments.
Bose demostró la sensibilidad de las plantas a través de experimentos.
B2 adjective /sɑːrˈkæstɪk/

sarcastic

sarcástico
Meaning
Using irony or mockery to convey contempt or humor.
Example
She made a sarcastic remark about his cooking.
Hizo un comentario sarcástico sobre su cocina.
A2 noun /seɪf/

Safe

seguro; protección
Meaning
secure container for storing valuables; protection from danger
Example
He kept his important documents in the office safe.
Guardó sus documentos importantes en la caja fuerte de la oficina.
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 verb sɪˈkwɛstər

sequester

aislar, esconder
Meaning
To isolate or hide away.
Example
The carbon captured by trees can be sequestered for years.
El carbono capturado por los árboles puede ser aislado durante años.
C2 adjective /ˈsʌb.æs.ɪd/

subacid

ligeramente ácido
Meaning
Slightly sour or acidic in taste or nature.
Example
The fruit had a subacid flavor that was refreshing on a hot day.
La fruta tenía un sabor ligeramente ácido que era refrescante en un día caluroso.
B2 verb /ˈsprɪŋkəl/

sprinkle

esparcir
Meaning
to scatter small drops or particles of a substance over a surface
Example
She sprinkled sugar on top of the cake.
Ella esparció azúcar encima del pastel.
C2 verb /ˌsuːpərˈæd/

superadd

superagregar
Meaning
to add something to what has already been added
Example
The author chose to superadd a new chapter to the revised edition.
El autor eligió superagregar un nuevo capítulo a la edición revisada.
C1 noun /ˈskɛptɪk/

skeptic

escéptico
Meaning
A person who doubts or questions accepted beliefs or claims.
Example
The scientist was a skeptic of theories without solid evidence.
El científico era escéptico de las teorías sin evidencia sólida.
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.
C2 noun /ˌsuː.pɚˈfluː.ə.t̬i/

superfluity

superfluidad
Meaning
An excessive amount of something; more than what is needed.
Example
The room was filled with a superfluity of decorations.
La habitación estaba llena de una superfluidad de decoraciones.
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.
B2 noun /sərˈvaɪvər/

Survivor

una persona que sobrevive, especialmente una persona que sigue viva después de un evento en el que otras personas han muerto
Meaning
a person who survives, especially a person remaining alive after an event in which others have died
Example
She is a cancer survivor who now helps other patients.
Ella es una sobreviviente de cáncer que ahora ayuda a otros pacientes.
B2 verb /swel/

swell

hincharse
Meaning
to become larger, rounder, or thicker; to increase in size
Example
Her ankle began to swell after the injury.
Su tobillo comenzó a hincharse después de la lesión.
B1 noun /ˈspɪr.ɪt/

Spirit

espíritu; alma; entusiasmo; coraje
Meaning
the non-physical part of a person; enthusiasm or courage; the essential character of something
Example
The team showed great spirit despite losing the match.
El equipo mostró un gran espíritu a pesar de perder el partido.
B2 noun /ˈskɔːr.pi.ən/

Scorpion

escorpión
Meaning
a small creature with eight legs, two claws, and a curved tail with a poisonous sting
Example
The scorpion hid under the rock during the day.
El escorpión se escondió debajo de la roca durante el día.
B2 noun /ˈseɪf.ɡɑːrd/

Safeguard

salvaguarda
Meaning
measure or action designed to protect someone or something
Example
New safeguards were implemented to prevent data breaches.
Se implementaron nuevas salvaguardas para prevenir violaciones de datos.
B2 adjective /slɪm/

slim

delgado
Meaning
thin in an attractive or healthy way; small in amount or chance
Example
She looked slim in her new dress.
Ella se veía delgada en su nuevo vestido.
C2 noun /ˌsɪnjuˈɒsɪti/

sinuosity

sinuosidad
Meaning
The quality or state of being winding, curving, or having many turns.
Example
The sinuosity of the river made navigation challenging.
La sinuosidad del río hizo que la navegación fuera desafiante.
C2 noun /sɪlf/

sylph

sílfide
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.
Ella se movió por el escenario como una sílfide, ligera y elegante.
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.
A2 preposition /sɪns/

since

desde
Meaning
from a particular time in the past until now
Example
I have known her since childhood.
La conozco desde la infancia.
B2 adjective /ˈsoʊʃəbəl/

Sociable

sociable; amigable; extrovertido
Meaning
friendly and enjoys being with other people; outgoing
Example
She is very sociable and makes friends easily.
Ella es muy sociable y hace amigos fácilmente.
B2 verb, noun /stæb/

stab

apuñalar
Meaning
to pierce or wound with a pointed weapon or object
Example
He was stabbed in the back during the altercation.
Fue apuñalado en la espalda durante la pelea.
B2 noun, verb /skruː/

screw

un pasador metálico con una hélice; fijar o apretar algo con un tornillo
Meaning
a metal fastener with a helical ridge; to fasten or tighten something with a screw
Example
He screwed the shelf to the wall tightly.
Él atornilló la estantería a la pared firmemente.
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.
A1 noun /ˈʃʊɡər/

Sugar

azúcar
Meaning
sweet crystalline substance used as a sweetener
Example
Please add two teaspoons of sugar to my coffee.
Por favor, agrega dos cucharaditas de azúcar a mi café.
C1 verb /ˈstæɡ.neɪt/

stagnate

estancarse
Meaning
to stop developing, progressing, or moving
Example
Without innovation, the business will stagnate.
sin innovación, el negocio se estancará.
B2 noun, verb /slænt/

slant

punto de vista sesgado
Meaning
A particular point of view; to slope or lean in a particular direction.
Example
The article had a political slant.
El artículo tenía una inclinación política.
A1 verb /steɪ/

stay

quedarse
Meaning
to remain in the same place; to continue being
Example
Please stay here until I return.
Por favor, quédate aquí hasta que regrese.
C1 noun /skraɪb/

scribe

escriba
Meaning
a person who writes documents, especially in ancient times; a professional copyist
Example
In ancient Egypt, scribes recorded important events.
En el antiguo Egipto, los escribas registraron eventos importantes.
A1 noun /ʃɒp/

shop

tienda
Meaning
a place where goods are sold to customers
Example
I need to go to the shop to buy some groceries.
Necesito ir a la tienda para comprar algunos víveres.
C1 verb /skɒf/

scoff

burlarse
Meaning
to speak about something in a mocking or dismissive way
Example
He scoffed at the idea of moving abroad.
Él se burló de la idea de mudarse al extranjero.
C2 adjective /ˈskʌr.ɪ.ləs/

scurrilous

calumnioso
Meaning
Using or expressed in coarse, abusive, or slanderous language.
Example
The politician faced criticism for his scurrilous remarks about his opponent.
El político enfrentó críticas por sus comentarios calumniosos sobre su oponente.
C1 verb /ˈswɛltər/

swelter

sufrir por calor intenso
Meaning
to suffer from intense heat
Example
We began to swelter in the midday sun.
Empezamos a sudar bajo el sol del mediodía.
B2 verb /swiːp/

sweep

barrer
Meaning
to clean by brushing; to move quickly and smoothly
Example
She sweeps the floor every morning.
Ella barre el suelo todas las mañanas.
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.
A2 adjective /ˈsʌðərn/

southern

del sur
Meaning
located in or facing the south; southern regions
Example
She moved to a southern city for work.
Se mudó a una ciudad del sur por trabajo.
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.
B2 adjective /ˈʃeɪ.ki/

Shaky

inestable; tembloroso; poco fiable; débil
Meaning
unstable; trembling; unreliable; weak
Example
His voice was shaky with nervousness.
Su voz estaba temblorosa por los nervios.
C1 noun /ˈʃær.ən fruːt/

Sharon fruit

fruta shéron
Meaning
a sweet orange persimmon fruit that can be eaten when firm
Example
The Sharon fruit is sweet and can be eaten like an apple.
la fruta shéron es dulce y se puede comer como una manzana.
B2 adjective /ˈsæv.ɪdʒ/

Savage

salvaje; feroz; incivilizado
Meaning
extremely cruel or violent; wild and fierce; uncivilized
Example
The savage attack shocked everyone.
El ataque salvaje sorprendió a todos.
A2 noun /ˈsɪl.vər/

Silver

plata
Meaning
a shiny white precious metal used for making jewelry and ornaments
Example
The silver ring sparkled in the sunlight.
El anillo de plata brillaba bajo la luz del sol.
B2 adverb /ˈsmuːð.li/

Smoothly

suavemente; sin problemas
Meaning
without problems or difficulties; in an even and regular way
Example
The car runs smoothly on the new highway.
El coche circula suavemente por la nueva carretera.
C2 noun /ˈʃʊərəti/

surety

garantía
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.
El arrendador requirió una garantía antes de alquilar el apartamento.
B2 adjective sɪnˈθet̬.ɪk

synthetic

sintético
Meaning
Made by chemical synthesis, especially to imitate a natural product; artificial.
Example
Synthetic chemicals are used in processed foods.
Los productos químicos sintéticos se utilizan en los alimentos procesados.
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.
B2 adverb /ˈstɛdɪli/

steadily

de manera constante
Meaning
in a regular and continuous way; without stopping or changing
Example
The company's profits have been increasing steadily.
Las ganancias de la empresa han aumentado de manera constante.
A1 adverb /suːn/

Soon

pronto
Meaning
in a short time; before long; quickly
Example
The train will arrive soon.
El tren llegará pronto.
C1 noun /ˈspɪnstər/

spinster

soltera
Meaning
An unmarried woman, often one who is older and considered unlikely to marry
Example
The novel featured a kind-hearted spinster who cared for the village children.
La novela presentó a una soltera de buen corazón que cuidaba a los niños del pueblo.
C2 verb /ˈstræɡəl/

straggle

moverse de manera desordenada
Meaning
To move or spread in an irregular, scattered, or untidy way.
Example
The children began to straggle behind on the long hike.
Los niños empezaron a quedarse atrás en la larga caminata.
C1 noun /ˈsɛpərətɪst/

separatist

separatista
Meaning
A person who supports the separation of a group from a larger body, often for political or cultural independence.
Example
The separatist group demanded independence from the central government.
El grupo separatista exigió la independencia del gobierno central.
A2 noun /ˈsiː.nər.i/

Scenery

paisaje
Meaning
the natural features of a landscape; the painted background used on a theater stage
Example
The mountain scenery was breathtakingly beautiful.
El paisaje montañoso era impresionante.
C2 verb /ˈsɪmpər/

simper

sonreír de manera tonta o afectada
Meaning
to smile in a silly, self-conscious, or affected way
Example
She simpered at his compliment, clearly embarrassed.
Ella sonrió tontamente ante su cumplido, claramente avergonzada.
C1 adjective /ˈstɛlər/

stellar

excepcional
Meaning
Relating to stars; outstanding or excellent.
Example
She gave a stellar performance in the play.
Ella dio una actuación excepcional en la obra.
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.
C2 noun /ˈsɪŋ.krə.ni/

synchrony

sincronía
Meaning
Coordination in time, harmony in action or movement.
Example
Their dance performance showed perfect synchrony.
Su actuación de baile mostró una sincronía perfecta.
C1 noun/verb /snɛər/

snare

trampa
Meaning
a trap for catching animals; to catch or trap
Example
The hunter set a snare to catch rabbits.
El cazador puso una trampa para atrapar conejos.
B2 noun /sɪlk/

silk

seda
Meaning
a fine, smooth fabric made from the threads produced by silkworms
Example
The dress was made of pure silk.
El vestido estaba hecho de seda pura.
B2 noun /ˈsleɪvəri/

slavery

esclavitud
Meaning
the system or state of being owned and forced to work for someone else
Example
Slavery was abolished in most countries in the 19th century.
La esclavitud fue abolida en la mayoria de los paises en el siglo diecinueve.
C1 adjective /ˈsɜːrvaɪl/ or /ˈsɜːrvəl/

servile

servil
Meaning
having or showing an excessive willingness to serve or please others
Example
His servile attitude annoyed his colleagues.
Su actitud servil molestaba a sus compañeros.
C1 adjective /ˈskrɪptʃərəl/

scriptural

escritural
Meaning
Relating to or contained in the scriptures or holy writings.
Example
The priest gave a scriptural reference during the sermon.
El sacerdote dio una referencia escritural durante el sermón.
C2 verb /ˈseɪʃiˌeɪt/

satiate

saciar
Meaning
To satisfy fully, especially with food or desire.
Example
The large meal satiated his hunger.
La gran comida sació su hambre.
A2 adjective /sɪksθ/

sixth

sexto
Meaning
coming after the fifth in order, position, or rank
Example
He finished the race in sixth place.
Terminó la carrera en sexto lugar.
C1 adjective /ˈskrʌfi/

Scruffy

desaliñado o desordenado en apariencia; sucio y desgastado
Meaning
untidy or unkempt in appearance; shabby and worn
Example
The scruffy old dog wandered through the streets looking for food.
El perro desaliñado caminó por las calles buscando comida.
B2 verb, noun /stɔːl/

stall

detener, puesto pequeño
Meaning
to stop or cause to stop temporarily; a small shop or stand
Example
The car stalled on the way to the office.
El coche se detuvo en el camino hacia la oficina.
C1 adjective /ˈspɛktrəl/

spectral

espectral
Meaning
Relating to a ghost or specter; ghostly. Also relating to a spectrum.
Example
The old mansion had a spectral atmosphere at night.
La vieja mansión tenía una atmósfera espectral por la noche.
B1 noun /sɔːrs/

Source

fuente
Meaning
a place, person, or thing from which something originates; the origin of information
Example
The river's source is high in the mountains.
La fuente del río se encuentra alta en las montañas.
C1 verb /skrɔːl/

scrawl

escribir rápidamente y de manera desordenada
Meaning
to write or draw something quickly and carelessly, making it hard to read
Example
He scrawled his signature at the bottom of the page.
Él scrawle su firma en la parte inferior de la página.
C2 adjective /ˈsed.j ə.l ə s/

Sedulous

diligente; aplicado;
Meaning
showing dedication and diligence; persistent and careful in work
Example
She was sedulous in her research, spending hours in the library every day.
Ella fue diligente en su investigación, pasando horas en la biblioteca todos los días.
B1 verb /spaɪ/

spy

espía
Meaning
to secretly collect information about a person, group, or country
Example
He was caught spying on his neighbor through the window.
Lo atraparon espiando a su vecino a través de la ventana.
C2 verb /sɛkˈstuːpəl/

sextuple

sextuplicar
Meaning
to make or become six times as great or as many
Example
Within two quarters, the campaign sextupled their daily sign-ups.
En dos trimestres, la campaña sextuplicó sus registros diarios.
A2 noun /ˈsoʊʃəl ˈmiːdiə/

social media

medios sociales
Meaning
Websites and applications that enable users to create and share content or to participate in social networking.
Example
Social media often causes delays.
Los medios sociales a menudo causan retrasos.
C2 noun /səˈɡæs.ə.t̬i/

sagacity

sabiduría profunda
Meaning
The quality of being sagacious; having or showing keen mental discernment and good judgment.
Example
His sagacity made him a great leader.
Su sagacidad lo convirtió en un gran líder.
B2 noun /səˈspens/

Suspense

suspenso
Meaning
a feeling of excited or anxious uncertainty about what will happen
Example
The movie kept us in suspense until the very end.
La película nos mantuvo en suspenso hasta el final.
C1 noun /ʃoʊl/

shoal

cardumen
Meaning
a large group of fish swimming together; a shallow place in water
Example
We saw a shoal of fish near the coast.
Vimos un cardumen de peces cerca de la costa.
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 /ˈʃrɪvəl/

shrivel

arrugar
Meaning
To become dry, wrinkled, and smaller due to lack of moisture.
Example
The flowers shriveled under the hot sun.
Las flores se arrugaron bajo el sol caliente.
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 /spekˈteɪtər/

Spectator

espectador
Meaning
a person who watches at a show, game, or other event; an observer
Example
The stadium was filled with excited spectators.
El estadio estaba lleno de espectadores emocionados.
C1 noun /slæɡ/

slag

escoria
Meaning
Stony waste matter separated from metals during the smelting process.
Example
The factory dumped the slag near the river.
La fábrica arrojó la escoria cerca del río.
C1 adjective /ˈskɛtʃi/

sketchy

incompleto
Meaning
not thorough or detailed; suspicious or unsafe
Example
The details of the project were still sketchy.
Los detalles del proyecto aún estaban incompletos.