spontaneously
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C1 adverb spɒnˈteɪnɪəsli

spontaneously

espontáneamente
Meaning
In a spontaneous way; naturally and without planning or external cause.
Example
Children learn spontaneously through peer interactions.
Los niños aprenden espontáneamente a través de interacciones entre compañeros.
C2 verb /ˈsnɪvəl/

snivel

llorar o quejarse de manera débil o molesta
Meaning
to cry or complain in a weak or annoying way
Example
He began to snivel when he didn’t get his way.
Comenzó a llorar cuando no consiguió lo que quería.
C1 verb /splaɪs/

splice

unir
Meaning
to join two pieces of rope, film, or other material by weaving or attaching them together
Example
The technician spliced the two wires to restore the connection.
El técnico unió los dos cables para restaurar la conexión.
C1 verb /ˈsɔːntər/

saunter

caminar despacio
Meaning
to walk in a slow, relaxed manner without hurry or effort
Example
We sauntered along the riverside, stopping now and then to watch the boats.
Caminamos lentamente por la orilla del río, deteniéndonos de vez en cuando para observar los botes.
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 /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.
A2 adjective /ˈsep.ər.ət/

Separate

separado; distinto; individual; aparte
Meaning
distinct; not connected; individual; apart
Example
Please keep your personal and professional lives separate.
Por favor, mantén tu vida personal y profesional separada.
C1 verb /spɔːn/

spawn

generar
Meaning
to produce or generate, often in large numbers
Example
The video game has spawned many sequels.
El videojuego ha generado muchas secuelas.
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.
B2 verb /skoʊld/

scold

regañar
Meaning
to criticize angrily; to rebuke
Example
The teacher scolded the students for being late.
La maestra regañó a los estudiantes por llegar tarde.
B1 verb /slɪp/

slip

resbalar
Meaning
to lose balance or fall while moving, or to accidentally slide from a position
Example
She slipped on the wet floor and fell.
Ella se resbaló en el piso mojado y cayó.
C1 verb /ˈstoʊnwɔːl/

stonewall

bloquear
Meaning
To delay or block progress by refusing to cooperate or answer
Example
The witness tried to stonewall during the investigation.
El testigo intentó hacer stonewall durante la investigación.
C2 verb /ˈsʌk.əl/

suckle

amamantar
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.
La madre gata amamantó a sus gatitos en la cesta.
C2 adjective /ˈsɪnjuːi/

sinewy

musculoso y fuerte
Meaning
Lean and muscular; strong and tough.
Example
The athlete had a sinewy build that showed his strength.
El atleta tenía una constitución musculosa que mostraba su fuerza.
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.
C2 noun /səˈvɑːnt/

savant

felicidad
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.
No pudo ocultar su felicidad cuando recibió el premio.
C1 verb /səbˈstænʃieɪt/

substantiate

substanciar
Meaning
To provide evidence to support or prove the truth of something.
Example
The lawyer worked to substantiate the claims with solid evidence.
El abogado trabajó para substanciar las reclamaciones con pruebas sólidas.
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.
B1 verb /ʃɪft/

shift

trasladar
Meaning
To move or change from one place, position, or situation to another.
Example
She had to shift her focus to the new project.
Ella tuvo que trasladar su enfoque al nuevo proyecto.
C1 verb /səˈfɪstɪkeɪt/

sophisticate

sofisticar
Meaning
to make something more complex or refined; to educate or develop in taste and manners
Example
Traveling abroad helped sophisticate his worldview.
Viajar al extranjero ayudó a sofisticar su visión del mundo.
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.
B2 noun, verb /striːk/

streak

rastro o línea; moverse rápidamente en una dirección especificada
Meaning
a long, thin line or mark; to move very quickly in a specified direction
Example
Lightning streaked across the night sky.
El rayo cruzó el cielo nocturno.
B2 noun /steɪn/

Stain

mancha; huella
Meaning
a colored patch or dirty mark that is difficult to remove; a blemish or damage to reputation
Example
There was a coffee stain on his white shirt.
Había una mancha de café en su camisa blanca.
B1 noun ˈsaɪləns

silence

silencio
Meaning
Complete absence of sound; quietness.
Example
Silence filled the air near the graves.
El silencio llenó el aire cerca de las tumbas.
B2 noun /səˈspɪʃən/

Suspicion

sospecha
Meaning
a feeling or thought that someone is guilty of an illegal or dishonest activity
Example
The police arrested him on suspicion of theft.
La policía lo arrestó por sospecha de robo.
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 verb /ˈstɑːrtl/

startle

sobresaltar
Meaning
To surprise or frighten someone suddenly.
Example
The loud noise startled the children.
El ruido fuerte sobresaltó a los niños.
C1 noun ˈsɪnədʒi

synergy

sinergia, cooperación
Meaning
The interaction or cooperation of two or more organizations, substances, or other agents to produce a combined effect greater than the sum of their separate effects.
Example
The synergy between the two companies led to a successful partnership.
La sinergia entre las dos empresas condujo a una exitosa asociación.
C1 verb/noun /skɒtʃ/

scotch

poner fin / whisky escocés
Meaning
to put an end to something; also a type of whisky
Example
The report scotched the rumors of a merger.
El informe puso fin a los rumores sobre una fusión.
A2 adverb /ˈslaɪtli/

slightly

ligeramente
Meaning
to a small degree or extent
Example
The temperature has slightly increased today.
La temperatura ha aumentado ligeramente hoy.
C2 noun səˈtaɪ.ə.ti

satiety

satisfacción
Meaning
The feeling of being satisfied or full, especially with regard to food.
Example
High-fiber foods provide longer satiety.
Los alimentos ricos en fibra proporcionan mayor satisfacción.
A2 noun /ˈsɪŋ.ər/

Singer

cantante
Meaning
a person who sings, especially as a job or profession
Example
The singer performed beautifully at the concert last night.
El cantante realizó una hermosa actuación en el concierto de anoche.
B2 noun /ˈsɑːfmɔːr/

sophomore

estudiante de segundo año
Meaning
a student in their second year of study at a university or high school
Example
He’s a sophomore in college, studying computer science.
Él es un estudiante de segundo año en la universidad, estudiando ciencias de la computación.
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.
A2 noun /ʃɔːrts/

shorts

pantalones cortos
Meaning
a short garment worn on the lower half of the body that covers each leg separately, usually above the knees.
Example
He wore a pair of blue shorts to the beach.
Él usó un par de pantalones cortos azules en la playa.
B1 noun /ˌsaʊθˈwɛst/

southwest

suroeste
Meaning
the direction that is between south and west; a region in that direction
Example
They traveled to the southwest of the country for their vacation.
Viajaron al suroeste del país para sus vacaciones.
C1 noun /ˈskwɒtər/

squatter

ocupante ilegal
Meaning
a person who unlawfully occupies an uninhabited building or unused land
Example
The police removed the squatters from the abandoned house.
La policía sacó a los ocupantes ilegales de la casa abandonada.
B1 verb /sɪŋk/

sink

hundir
Meaning
to go down below the surface; to descend
Example
The ship sinks in the deep ocean.
El barco se hunde en el océano profundo.
C1 noun /ˈstændˌstɪl/

standstill

paro
Meaning
a situation in which all movement or activity stops
Example
The traffic came to a standstill after the accident.
El tráfico llegó a un paro después del accidente.
C1 noun /ˈsɪmətri/

symmetry

simetría
Meaning
the quality of having balanced proportions or identical parts facing each other
Example
The building’s symmetry impressed the visitors.
La simetría del edificio impresionó a los visitantes.
A1 verb /set/

set

colocar
Meaning
to put or place something in a position; to establish
Example
She set the book on the table.
Ella puso el libro sobre la mesa.
B2 adjective /stəˈtɪstɪkəl/

statistical

estadístico
Meaning
relating to the use or analysis of numerical data
Example
The report provides statistical data about population growth.
El informe proporciona datos estadísticos sobre el crecimiento de la población.
C2 adjective /sɪˈdɪʃəs/

seditious

sedicioso
Meaning
Encouraging rebellion against authority.
Example
The activist spread seditious pamphlets among the crowd.
El activista distribuyó folletos sediciosos entre la multitud.
C1 adjective /seɪdʒ/

Sage

sabio; prudente; con buen juicio
Meaning
wise; showing wisdom from experience; prudent; having good judgment
Example
The sage advice from the elder helped solve the problem.
El sabio consejo del anciano ayudó a resolver el problema.
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 adjective /sliːk/

sleek

elegante y brillante
Meaning
smooth, shiny, and stylish
Example
She drove a sleek black sports car.
Ella condujo un coche deportivo brillante y elegante.
C2 noun /səbˈsɜːviəns/

subservience

subyugación
Meaning
the condition of being too willing to obey or serve others
Example
His subservience to authority annoyed his colleagues.
Su subyugación a la autoridad molestó a sus colegas.
B1 adverb /səˈpraɪzɪŋli/

surprisingly

sorprendentemente
Meaning
in a way that causes surprise or amazement
Example
Surprisingly, she finished the entire project in just one day.
Sorprendentemente, terminó todo el proyecto en solo un día.
B2 noun /ˈʃʌtəl/

shuttle

vehículo que viaja regularmente entre dos lugares
Meaning
a vehicle or craft that travels regularly between two places.
Example
The airport shuttle runs every 30 minutes.
El servicio de transporte del aeropuerto circula cada 30 minutos.
C2 noun /sɑːrˈkɒfəɡəs/

sarcophagus

ataúd de piedra
Meaning
A stone coffin, often decorated, used in ancient times.
Example
The museum displayed a beautifully carved sarcophagus from ancient Egypt.
El museo exhibió un ataúd de piedra bellamente tallado de la antigua Egipto.
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.
A2 noun /stɛə/

stair

escalón
Meaning
a step or set of steps leading from one level to another
Example
He tripped on the stair and fell down.
Se tropezó con el escalón y cayó.
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.
B2 adjective /ˈʃeɪm.fəl/

Shameful

vergonzoso; deshonroso; embarazoso
Meaning
causing shame; disgraceful; embarrassing
Example
His shameful behavior embarrassed the entire family.
Su comportamiento vergonzoso avergonzó a toda la familia.
A2 noun /sneɪk/

Snake

serpiente
Meaning
a long, legless reptile that moves by sliding along the ground
Example
The snake slithered through the grass quietly.
La serpiente se deslizaba tranquilamente por la hierba.
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 /ˈsʌfərɪŋ/

suffering

sufrimiento
Meaning
the state of undergoing pain, distress, or hardship
Example
They tried to relieve his suffering with medicine.
Intentaron aliviar su sufrimiento con medicina.
A1 noun /sʌn/

Sun

sol
Meaning
the star around which the earth orbits; the source of light and heat for planets
Example
The sun rises in the east and sets in the west.
El sol sale por el este y se pone por el oeste.
C2 noun /ˌskʌlˈdʌɡəri/

skullduggery

engaño
Meaning
dishonest behavior or activities, often done secretly
Example
The election was full of political skullduggery.
La elección estuvo llena de engaños políticos.
B2 noun /slæŋ/

Slang

jerga; lenguaje informal
Meaning
very informal language that is usually spoken rather than written
Example
The teenagers used slang that their parents couldn't understand.
Los adolescentes usaron jerga que sus padres no pudieron entender.
B1 adjective /slaɪt/

Slight

ligero; pequeño; delgado; sutil
Meaning
small in degree; not severe or intense; slim; thin
Example
There was a slight delay in the train schedule.
Hubo un pequeño retraso en el horario del tren.
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.
A1 noun /sʌn/

son

hijo
Meaning
a male child of a parent
Example
His son is very talented in music.
Su hijo es muy talentoso en la música.
B2 noun/verb /stʌmp/

stump

tronco de árbol, desconcertar
Meaning
the base of a tree left after the trunk is cut down; to puzzle or confuse
Example
The question completely stumped the students.
La pregunta desconcertó completamente a los estudiantes.
A2 noun /stoʊn/

stone

piedra
Meaning
a hard, naturally occurring mineral material found in the earth
Example
He threw a stone into the lake.
Lanzó una piedra al lago.
A1 pronoun /ˈsʌmbədi/

somebody

alguien
Meaning
an unspecified person
Example
Somebody is knocking at the door.
Alguien está tocando la puerta.
B1 noun /ˈsɜr.fɪs/

Surface

superficie; capa superior
Meaning
the outside part or uppermost layer of something
Example
The submarine emerged to the surface of the ocean.
El submarino emergió a la superficie del océano.
B2 noun ˈsiːzənəl ˈvedʒtəbəlz

seasonal vegetables

verduras de temporada
Meaning
Vegetables that grow during specific seasons or times of the year
Example
Seasonal vegetables grow abundantly in winter.
Las verduras de temporada crecen abundantemente en invierno.
C1 noun /ˈslændər/

Slander

calumnias
Meaning
the action of making false spoken statements damaging to someone's reputation
Example
The politician sued the newspaper for slander.
El político demandó al periódico por calumnias.
C1 noun ˌsætʃəˈreɪʃən

saturation

saturación
Meaning
The state of being saturated; the degree or extent to which something is dissolved or absorbed
Example
The saturation of the market with similar products reduced sales.
La saturación del mercado con productos similares redujo las ventas.
B2 noun ˈʃɔːtkʌmɪŋz

shortcomings

deficiencias
Meaning
A fault or failure to meet a certain standard; deficiencies.
Example
Institutional shortcomings affect student behavior negatively.
Las deficiencias institucionales afectan negativamente el comportamiento de los estudiantes.
B2 noun /ˈset.əl.mənt/

Settlement

asentamiento; acuerdo
Meaning
a place where people establish a community; an agreement that ends a dispute
Example
The early settlement was built near the river for easy access to water.
El primer asentamiento fue construido cerca del río para un acceso fácil al agua.
C1 noun /spæt/

spat

disputa pequeña
Meaning
a short, petty quarrel or argument
Example
They had a brief spat about who should do the dishes.
Tuvieron una breve disputa sobre quién debería lavar los platos.
C1 noun ˈstræt.ə.sfɪər

stratosphere

estratósfera
Meaning
The layer of the earth's atmosphere above the troposphere, extending to about 50 km above the earth's surface.
Example
The stratosphere provides a unique environment.
La estratósfera proporciona un entorno único.
A2 noun /skɪlz/

skills

habilidades
Meaning
The ability to do something well; expertise.
Example
Learning new skills can increase personal and professional growth.
Aprender nuevas habilidades puede aumentar el crecimiento personal y profesional.
B2 noun /ˈskriːnɪŋ/

screening

examen o proyección
Meaning
the act of examining or testing people to detect disease or evaluate suitability; a showing of a movie or program
Example
The hospital offered free health screening for all employees.
El hospital ofreció exámenes de salud gratuitos para todos los empleados.
C2 noun /ˈsɜːfdəm/

serfdom

servidumbre
Meaning
The status or condition of being a serf, bound to work for a lord.
Example
Many peasants in medieval Europe lived under serfdom.
Muchos campesinos en la Europa medieval vivían bajo la servidumbre.
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 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.
C2 noun /ˈseɪ.li.əns/

salience

saliencia
Meaning
The quality of being particularly noticeable or important; prominence.
Example
The salience of the issue was highlighted in the debate.
La saliencia del asunto se destacó en el debate.
C2 noun/verb /sluːs/

sluice

compuerta de agua / enjuagar
Meaning
A sliding gate for controlling the flow of water; to wash or rinse with water in large quantities.
Example
The workers sluiced the mud off the street after the heavy rain.
Los trabajadores limpiaron el barro de la calle después de la fuerte lluvia.
C2 noun /ˌsuːpərɪnˈtɛndəns/

superintendence

supervisión
Meaning
the act of overseeing, supervising, or managing
Example
The superintendence of the school is the principal’s duty.
La supervisión de la escuela es deber del director.
C2 noun /sɪnˈtɪl.ə/

scintilla

pequeña chispa
Meaning
A tiny trace or spark of a specified quality or feeling.
Example
There wasn’t a scintilla of doubt in her mind.
No había ni una chispa de duda en su mente.
B2 adjective /senˈseɪʃənəl/

Sensational

sensacional; impresionante; asombroso
Meaning
causing great excitement or shock; extremely impressive
Example
The sensational performance left the audience speechless.
El rendimiento sensacional dejó a la audiencia sin palabras.
A2 verb /sɑːlv/

solve

resolver
Meaning
to find an answer to a problem or question; to resolve a difficulty
Example
The detective finally solved the mysterious case.
El detective finalmente resolvió el caso misterioso.
C2 noun /ˈstrætədʒəm/

stratagem

estratagema
Meaning
a plan or scheme designed to achieve a particular goal, often by trickery
Example
The general devised a clever stratagem to outwit the enemy.
El general ideó una astuta estratagema para engañar al enemigo.
B2 verb, noun /ʃeɪv/

shave

afeitar
Meaning
To remove hair from the body, typically using a razor; the act of removing hair
Example
He likes to shave every morning before work.
Le gusta afeitarse todas las mañanas antes del trabajo.
C2 noun /ˈsɒlɪˌsɪzəm/

solecism

solecismo
Meaning
a grammatical mistake in speech or writing; a breach of good manners or etiquette
Example
His speech was full of solecisms and awkward phrases.
Su discurso estaba lleno de solecismos y frases incómodas.
B2 noun /ˈskɛlɪtən/

skeleton

esqueleto
Meaning
The internal framework of bones that supports the body of a human or animal.
Example
The teacher showed the students a human skeleton in the biology class.
El maestro mostró a los estudiantes un esqueleto humano en la clase de biología.
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.
A2 noun /ˈsɪz.ərz/

Scissors

tijeras
Meaning
a cutting instrument with two sharp blades that are joined and work against each other
Example
She used scissors to cut the paper into small pieces.
Ella usó las tijeras para cortar el papel en pedazos pequeños.
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.
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 /ˈsɛntəmənt/

Sentiment

sentimiento
Meaning
a feeling or opinion, especially one based on emotion; tender feelings of affection
Example
Public sentiment was strongly against the new policy.
La opinión pública estaba fuertemente en contra de la nueva política.
A1 verb /spik/

speak

hablar
Meaning
to say words; to communicate verbally
Example
She can speak three languages fluently.
Ella puede hablar tres idiomas con fluidez.
B2 verb /slæm/

slam

golpear con fuerza
Meaning
to close or hit something with great force
Example
He slammed the door angrily after the argument.
Él slaméo la puerta enojado después de la discusión.
B1 noun /ˈspiːʃiːz/

Species

especie; tipo
Meaning
a group of living organisms that can reproduce with each other; a type or kind
Example
The Amazon rainforest is home to thousands of animal species.
La selva amazónica es hogar de miles de especies animales.
B2 adjective /suːˈpɪə.ri.ər/

Superior

superior; mejor que el promedio
Meaning
higher in rank, quality, or importance; better than average
Example
This product is superior to all others in the market.
Este producto es superior a todos los demás en el mercado.
A2 noun /ˈstrɔːbəri/

Strawberry

fresa
Meaning
a small red heart-shaped fruit with tiny seeds on the surface and sweet taste
Example
I love eating fresh strawberries with cream during summer.
Me encanta comer fresas frescas con crema durante el verano.
B2 noun /spæn/

span

extensión
Meaning
the full extent or length of something from one end to another
Example
The bridge has a span of over 500 meters.
El puente tiene una extensión de más de 500 metros.
C1 noun /ˈsed.ɪ.mənt/

Sediment

sedimento
Meaning
matter that settles to the bottom of a liquid; particles deposited by water or wind
Example
The river carried sediment downstream during the flood.
El río llevó sedimento río abajo durante la inundación.
B2 adjective /səˈbɜːrbən/

suburban

suburbano
Meaning
relating to or characteristic of a suburb or the people living there
Example
They bought a house in a quiet suburban area.
Compraron una casa en una zona suburbana tranquila.
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.
A2 noun ˈsaɪəns

science

ciencia
Meaning
The intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.
Example
Science continues to explore the unknown.
La ciencia sigue explorando lo desconocido.
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.
C1 verb /ˈʃʌdər/

shudder

temblar
Meaning
to tremble or shake suddenly, often due to fear, cold, or strong emotion
Example
She shuddered at the thought of walking alone in the dark forest.
Ella se estremeció al pensar en caminar sola en el oscuro bosque.
C2 noun /seɪn/

seine

gran red
Meaning
A large fishing net that hangs vertically in the water.
Example
The fishermen cast their seine into the river.
Los pescadores echaron su gran red en el río.
C1 adjective /ˌsuː.pəˈsɒn.ɪk/

Supersonic

más rápido que la velocidad del sonido; relacionado con velocidades mayores que la del sonido
Meaning
faster than the speed of sound; relating to speeds greater than the speed of sound
Example
The supersonic jet broke the sound barrier.
El avión supersónico rompió la barrera del sonido.
B2 adjective /ˌsɪm.pəˈθet.ɪk/

Sympathetic

compasivo; comprensivo; sensible;
Meaning
showing compassion or understanding for someone's feelings or situation
Example
She was very sympathetic when I told her about my problems.
Ella fue muy simpática cuando le conté mis problemas.
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.
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.
C1 adjective ˈskruː.pjʊ.ləs

scrupulous

escrupuloso
Meaning
Diligent, thorough, and extremely attentive to details; having moral integrity; acting in strict regard for what is considered right or proper.
Example
He is known for being scrupulous in his work.
Es conocido por ser escrupuloso en su trabajo.
C2 adjective /ˈsuːpaɪn/

supine

en posición supina
Meaning
Lying on the back, face upward; failing to act due to laziness or weakness.
Example
He lay supine on the grass, staring at the stars.
Él estaba acostado en el césped, mirando las estrellas.
C2 adjective /sɛpˈtɛnɪəl/

septennial

septenario
Meaning
Occurring every seven years.
Example
The festival is a septennial tradition in the village.
El festival es una tradición septenaria en el pueblo.
A2 noun /ˈsiːkrət/

secret

secreto
Meaning
something that is kept or meant to be kept unknown or unseen by others
Example
He told me a secret about his childhood.
Me dijo un secreto sobre su infancia.
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.
B2 noun ˈsɪblɪŋz

Siblings

hermanos
Meaning
Each of two or more children or offspring having one or both parents in common.
Example
Siblings are usually placed on the same level in a family tree.
Los hermanos generalmente están en el mismo nivel en el árbol genealógico de la familia.
C1 noun /ˈsəʊdiəm/

sodium

sodio
Meaning
a soft, silver-white chemical element that is highly reactive and found in salt.
Example
Sodium is an essential element for maintaining fluid balance in the body.
El sodio es un elemento esencial para mantener el equilibrio de líquidos en el cuerpo.
B2 adjective /slæk/

slack

flojo
Meaning
not tight, firm, or busy; lacking tension or activity
Example
Business is slack during the rainy season.
El negocio está flojo durante la temporada de lluvias.
B1 noun /ˈsæm.ən/

salmon

salmón
Meaning
A large fish with pink flesh, often eaten as food.
Example
They served grilled salmon for dinner.
Sirvieron salmón a la parrilla para la cena.
B1 noun /ˌsæt.ɪsˈfæk.ʃən/

Satisfaction

satisfacción
Meaning
fulfillment of one's wishes, expectations, or needs
Example
She felt great satisfaction after completing the project.
Ella sintió una gran satisfacción después de completar el proyecto.