slim
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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.
B2 adjective /stɜːrn/

Stern

estricto; severo
Meaning
serious and demanding exact conformity to rules; strict and severe
Example
The teacher gave the students a stern warning about cheating.
El maestro dio a los estudiantes una advertencia estricta sobre hacer trampa.
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.
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.
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?
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 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.
C1 adjective /ˈstraɪ.dənt/

strident

estridente, ruidoso
Meaning
loud and harsh; presenting a point of view in a forceful way
Example
His strident voice made the debate uncomfortable.
Su voz estridente hizo que el debate fuera incómodo.
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.
A2 verb /swɪm/

swim

nadar
Meaning
to move through water using body movements
Example
I love to swim in the ocean during summer.
Me encanta nadar en el océano durante el verano.
A2 noun /ʃiːt/

sheet

sábana
Meaning
a large piece of cloth or paper, typically used to cover or protect something
Example
I need a clean sheet to cover the bed.
Necesito una sábana limpia para cubrir la cama.
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.
B1 noun /ˈsʌməri/

summary

resumen
Meaning
A brief statement of the main points of something.
Example
She wrote a summary of the book for her class.
Ella escribió un resumen del libro para su clase.
C1 noun /ˈsʌtlti/

subtlety

sutileza
Meaning
The quality or state of being subtle.
Example
She understood the subtlety of the situation.
Ella entendió la sutileza de la situación.
C2 noun /ˈsʌbtrəˌhɛnd/

subtrahend

minuendo
Meaning
a number that is to be subtracted from another number
Example
In the equation 10 - 4, the number 4 is the subtrahend.
En la ecuación 10 - 4, el número 4 es el minuendo.
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.
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, verb /skiːm/

scheme

plan / conspiración
Meaning
a plan or arrangement, especially one that is secret or dishonest
Example
They devised a scheme to cheat investors.
Ellos idearon un esquema para engañar a los inversionistas.
C1 verb /smɛlt/

smelt

fundir
Meaning
to extract metal from its ore by heating and melting
Example
The workers smelt iron from its ore in the factory.
Los trabajadores funden hierro de su mineral en la fábrica.
B2 noun /ˈsiː.krə.si/

Secrecy

secreto
Meaning
the practice of keeping something secret; the state of being kept hidden
Example
The project was conducted in complete secrecy.
El proyecto se llevó a cabo en completo secreto.
C2 noun /səbˈmɜːrʒən/

submersion

inmersión
Meaning
the state of being under water
Example
The submersion of the fields lasted for several days after the heavy rain.
La inmersión de los campos duró varios días después de la lluvia fuerte.
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.
B1 noun /swet/

Sweat

sudor
Meaning
moisture exuded through the pores of the skin, typically as a reaction to heat, physical exertion, fever, or fear
Example
After running for an hour, he was covered in sweat.
Después de correr una hora, estaba cubierto de sudor.
B1 adjective /ˈsekənderi/

secondary

secundario
Meaning
Less important than something else; derived from or dependent on something primary.
Example
Safety is our primary concern, while speed is only secondary.
La seguridad es nuestra principal preocupación, mientras que la velocidad es solo secundaria.
C2 adjective /sʌbˈdʒeɪsənt/

subjacent

subyacente
Meaning
lying immediately beneath; underlying
Example
The geological survey revealed subjacent layers of rock.
La encuesta geológica reveló capas subyacentes de roca.
C2 adjective, noun /səbˈmɜːrsəbl/

submersible

sumergible
Meaning
capable of being submerged; a small underwater craft
Example
The scientists explored the deep ocean using a submersible.
Los científicos exploraron el océano profundo utilizando un sumergible.
C2 noun /ˈsteɪsɪs/ or /ˈstæsɪs/

stasis

estasis
Meaning
A state of inactivity or equilibrium; a situation where nothing changes.
Example
The negotiations reached a state of stasis with no progress made.
Las negociaciones llegaron a un estado de estasis sin avances.
C2 noun /ˈsɑːrdʒənt ət ɑːrmz/

sergeant-at-arms

sargento de armas
Meaning
An officer responsible for maintaining order during meetings or legislative sessions.
Example
The sergeant-at-arms escorted the disruptive member out of the hall.
El sargento de armas escoltó al miembro disruptivo fuera del salón.
C2 noun /ˈsɒfɪzəm/

sophism

sofisma
Meaning
a clever but misleading argument; fallacious reasoning
Example
The politician's speech was full of sophism designed to mislead voters.
El discurso del político estaba lleno de sofismo diseñado para engañar a los votantes.
C1 verb /snɪər/

sneer

sonreír de forma burlona
Meaning
to smile or speak in a mocking or contemptuous way
Example
She sneered at his attempt to sing.
Ella se burló de su intento de cantar.
B2 noun /soʊp keɪs/

Soap case

caja de jabón
Meaning
a container used to store soap
Example
She bought a beautiful soap case for the bathroom.
Ella compró una hermosa caja de jabón para el baño.
B1 adjective ˈsteɪbl

stable

estable
Meaning
Not likely to change or fail; firmly established.
Example
Strong nuclear force keeps the nucleus stable.
La fuerte fuerza nuclear mantiene el núcleo estable.
C2 adjective /saɪˈdɪəriəl/

sidereal

sideral
Meaning
Relating to the stars or constellations; measured relative to the stars.
Example
Astronomers use sidereal time to track the positions of stars.
Los astrónomos usan el tiempo sideral para rastrear las posiciones de las estrellas.
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.
B2 noun /ˈsɜːdʒən/

surgeon

cirujano
Meaning
a doctor who performs medical operations
Example
The surgeon performed a complex heart operation.
El cirujano realizó una operación compleja de corazón.
B2 noun /swiːt/

suite

suite
Meaning
a set of rooms designated for one person's or family's use or for a particular purpose
Example
They stayed in the presidential suite at the hotel.
Se hospedaron en la suite presidencial del hotel.
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.
A2 adjective /sɪk/

Sick

enfermo; con náuseas; mal
Meaning
unwell; having a disease or illness; feeling nauseous
Example
She stayed home from work because she was feeling sick.
Ella se quedó en casa del trabajo porque se sentía mal.
C1 adjective /ˈstɪltɪd/

stilted

artificial, forzado
Meaning
Speech or writing that is stiff, unnatural, or overly formal.
Example
His speech sounded stilted and rehearsed.
Su discurso sonaba forzado y ensayado.
C1 verb/noun /ˈswæɡ.ər/

swagger

presunción
Meaning
To walk or behave in a very confident and arrogant way.
Example
He swaggered into the room as if he owned the place.
Entró en la habitación como si fuera dueño del lugar.
C1 verb /ˈstaɪfəld/

stifled

sofocar
Meaning
to suppress, hold back, or prevent something from happening
Example
He stifled a laugh during the serious meeting.
Él sofocó una risa durante la reunión seria.
C2 noun /staɪn/

stein

taza de cerveza
Meaning
A large beer mug, typically made of glass or stoneware.
Example
He raised his stein to toast his friends.
Él levantó su stein para brindar por sus amigos.
C1 noun/verb /ˈslʌmbər/

slumber

sueño
Meaning
A state of sleep; to sleep lightly or rest.
Example
The child slumbered peacefully through the night.
El niño durmió pacíficamente durante la noche.
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.
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.
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.
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 /ˈsɜːrli/

surly

gruñón
Meaning
bad-tempered and unfriendly
Example
The waiter gave us a surly look when we asked for more water.
El camarero nos miró de forma gruñona cuando pedimos más agua.
B2 adverb /səˈpəʊzɪdli/

supposedly

supuestamente
Meaning
used to show that something is believed or claimed to be true, though it may not be
Example
He is supposedly the best player on the team.
Supuestamente, él es el mejor jugador del equipo.
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 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.
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 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.
A1 noun /ʃɜːrt/

Shirt

camisa
Meaning
a piece of clothing worn on the upper body with sleeves and buttons
Example
He wore a white shirt to the office.
Él usó una camisa blanca para la oficina.
B2 noun /ˈsikwəl/

Sequel

secuela
Meaning
a published, broadcast, or recorded work that continues the story or develops the theme of an earlier one; something that takes place after or as a result of an earlier event
Example
The movie sequel was even more successful than the original.
La secuela de la película fue aún más exitosa que la original.
B1 verb /spɛl/

spell

deletrear
Meaning
to write or name the letters of a word in order; to mean or result in something
Example
Can you spell your name for me?
¿Puedes deletrear tu nombre para mí?
B2 noun ˌsɛlf.kənˈtrəʊl

self-control

autocontrol
Meaning
The ability to control one's emotions, behavior, and desires in order to obtain some reward, or avoid some punishment, typically in the longer term.
Example
Self-control is important for maintaining a balanced life.
El autocontrol es importante para mantener una vida equilibrada.
C1 adjective /səˈnɔːrəs/

sonorous

sonido profundo
Meaning
Deep, full, and rich in sound.
Example
The actor's sonorous voice filled the entire theater.
La voz sonorosa del actor llenó todo el teatro.
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 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.
B2 verb /ˈʃʌfəl/

shuffle

caminar arrastrando los pies / mezclar
Meaning
to walk by dragging one's feet along or without lifting them fully; to mix or rearrange
Example
He shuffled the cards before dealing them.
Él barajó las cartas antes de repartirlas.
C1 adjective ˈsek.tər spəˈsɪf.ɪk

sector-specific

específico del sector
Meaning
Relating to or designed for a particular sector or industry.
Example
Sector-specific policies attract targeted investments.
Las políticas específicas del sector atraen inversiones dirigidas.
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 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 verb, adjective, noun /spruːs/

spruce

arreglar / un tipo de árbol
Meaning
to make neat or tidy in appearance; also refers to an evergreen tree
Example
He spruced up his room before the guests arrived.
Él arregló su habitación antes de que llegaran los invitados.
B1 verb /ʃaʊt/

shout

gritar
Meaning
to say something very loudly
Example
He shouted at the top of his lungs to get their attention.
Él gritó tan fuerte como pudo para captar su atención.
B1 verb /səˈspɛkt/

suspect

sospechar
Meaning
to believe that someone has done something wrong; to doubt or mistrust
Example
I suspect he is lying about his whereabouts.
Sospecho que está mintiendo sobre su paradero.
B2 noun /ˈsɪr.i.əs.nəs/

Seriousness

seriedad; importancia
Meaning
the quality of being serious; gravity; importance
Example
The seriousness of the situation became clear when the doctor spoke.
La seriedad de la situación quedó clara cuando el doctor habló.
A1 modal verb /ʃʊd/

should

debería
Meaning
used to indicate obligation or duty
Example
You should study for your exams.
Deberías estudiar para tus exámenes.
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 /ˈspɛktər/

specter

espectro
Meaning
A ghost or spirit; something that causes fear or dread.
Example
The specter of war still haunts the region.
El espectro de la guerra todavía acecha la región.
B2 noun sɔɪl ɪˈrəʊʒən

soil erosion

erosión del suelo
Meaning
The wearing away of topsoil by water, wind, or other natural forces.
Example
Soil erosion can lead to the loss of fertile land.
La erosión del suelo puede llevar a la pérdida de tierras fértiles.
C2 adjective /ˈstraɪ.eɪ.tɪd/

striated

estriado
Meaning
marked with thin lines, grooves, or stripes
Example
The muscle fibers appeared striated under the microscope.
Las fibras musculares aparecieron estriadas bajo el microscopio.
C1 noun /ˌstætʃuˈɛt/

statuette

estatuilla
Meaning
A small statue, usually decorative or artistic.
Example
The artist won a gold statuette for his work.
El artista ganó una estatuilla de oro por su trabajo.
C1 noun /ˈstɛə.rɪ.əʊˌtaɪ.pɪŋ/

stereotyping

estereotipar
Meaning
A widely held but fixed and oversimplified image or idea of a particular type of person or thing.
Example
Stereotyping people based on their race is harmful.
Estereotipar a las personas según su raza es perjudicial.
C1 adjective /sɪˈmɛtrɪkəl/

symmetrical

simétrico
Meaning
having parts on either side that match or are the same in shape, size, or arrangement
Example
The artist designed a symmetrical pattern on the floor.
El artista diseñó un patrón simétrico en el suelo.
C2 noun /ˈspɛndˌθrɪft/

spendthrift

derrochador
Meaning
A person who spends money extravagantly or wastefully.
Example
The young prince was known as a spendthrift, wasting his fortune on lavish parties.
El joven príncipe era conocido como un derrochador, desperdiciando su fortuna en fiestas lujosas.
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.
A2 adverb /ˈsʌd.ən.li/

Suddenly

de repente
Meaning
quickly and without warning; unexpectedly
Example
The car suddenly stopped in the middle of the road.
El coche se detuvo de repente en medio de la carretera.
C1 noun /ˌsæl.jʊˈteɪ.ʃən/

Salutation

saludo; expresión de buenos deseos
Meaning
a greeting; an expression of goodwill
Example
The letter began with a formal salutation.
La carta comenzó con un saludo formal.
A2 noun /spiːtʃ/

Speech

discurso; alocución;
Meaning
formal address or discourse delivered to an audience; the expression of thoughts in spoken words
Example
The president gave an inspiring speech to the nation.
El presidente dio un discurso inspirador a la nación.
B2 adjective /sə'spɪʃ.əs/

Suspicious

sospechoso; dudoso
Meaning
having or showing distrust; doubtful; questionable
Example
The police found his behavior very suspicious.
La policía encontró su comportamiento muy sospechoso.
A2 noun /ˈʃaʊər/

shower

ducha
Meaning
a brief fall of rain or snow or a device for taking a bath or washing oneself
Example
After the workout, I took a quick shower to refresh myself.
Despues del entrenamiento, me di una ducha rapida para refrescarme.
C2 noun /səˈnɛs.əns/

senescence

envejecimiento
Meaning
The process of growing old or the condition of aging.
Example
The biologist studied senescence in plants to understand aging.
El biólogo estudió la senescencia en las plantas para entender el envejecimiento.
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.
B2 noun /ˈʃuːtɪŋ/

shooting

rodaje
Meaning
the action of shooting a gun, camera, or similar device
Example
The shooting of the movie took several months.
El rodaje de la película tomó varios meses.
B2 noun /ˈstæm.ɪ.nə/

Stamina

resistencia
Meaning
the ability to sustain prolonged physical or mental effort
Example
Marathon runners need great stamina to complete the race.
Los corredores de maratón necesitan gran resistencia para completar la carrera.
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.
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.
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.
A1 verb /seɪv/

save

salvar, ahorrar
Meaning
to rescue from danger; to keep for future use
Example
It's important to save money for emergencies.
Es importante ahorrar dinero para emergencias.
A2 adjective /smuːð/

Smooth

suave; liso; sin dificultades; fluido
Meaning
having an even surface; without difficulties; flowing easily
Example
The road was smooth and comfortable to drive on.
El camino estaba suave y cómodo para conducir.
A1 verb /siː/

see

ver
Meaning
to perceive with the eyes; to understand; to meet
Example
I can see the mountain from here.
Puedo ver la montaña desde aquí.
B2 verb /ˈsuːpərvaɪz/

supervise

supervisar
Meaning
to watch and direct a person or activity to ensure things are done correctly
Example
The teacher supervises students during the exam.
El maestro supervisa a los estudiantes durante el examen.
C1 noun /sɪˈkriː.ʃən/

Secretion

secreción
Meaning
a process by which substances are produced and discharged from a cell or gland
Example
Insulin secretion is crucial for blood sugar regulation.
La secreción de insulina es crucial para la regulación del azúcar en sangre.
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.
B2 noun /ˈʃɛərˌhoʊldər/

shareholder

accionista
Meaning
an individual or organization that owns shares in a company
Example
Each shareholder has the right to vote at the annual meeting.
Cada accionista tiene derecho a votar en la reunión anual.
B2 adjective /ˈstraɪkɪŋ/

striking

impactante
Meaning
very noticeable or impressive in appearance or effect
Example
Her striking beauty caught everyone's attention.
Su belleza impactante atrajo la atención de todos.
C1 adjective /ˈskeɪ.li/

Scaly

escamoso
Meaning
covered with scales; having a rough surface like scales
Example
The fish has scaly skin.
El pez tiene la piel escamosa.
C1 noun /ˈsɜːrtʃɑːrdʒ/

surcharge

recargo adicional
Meaning
an additional charge or payment added to the usual cost
Example
The airline ticket had a fuel surcharge added to it.
El boleto de avión tenía un recargo por combustible agregado.
B2 noun /ˌsɛlf ɪˈstiːm/

self-esteem

autoestima
Meaning
confidence in one's own worth or abilities; self-respect
Example
Building self-esteem takes time and consistent effort.
Construir la autoestima requiere tiempo y esfuerzo constante.
A2 adverb /ˈsʌm.haʊ/

Somehow

de alguna manera;
Meaning
in some way; for some reason that is not clear
Example
Somehow, I managed to finish the project on time.
De alguna manera, logré terminar el proyecto a tiempo.
C2 noun /sɛkˈstɛt/

sextet

sexteto
Meaning
a group of six people playing music or a piece written for six performers
Example
The jazz sextet filled the small club with a warm, layered sound.
El sexteto de jazz llenó el pequeño club con un sonido cálido y en capas.
C1 noun səˈsteɪnəbəl ænd kəˈlæbərətɪv əˈproʊtʃ

sustainable and collaborative approach

enfoque sostenible y colaborativo
Meaning
A method of working together that can be maintained over time without depleting resources or causing harm.
Example
A sustainable and collaborative approach is crucial for solving environmental problems.
Un enfoque sostenible y colaborativo es crucial para resolver los problemas ambientales.
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.
B2 adjective /ˈsteɪʃəˌneri/

stationary

estático
Meaning
Not moving or not intended to be moved.
Example
The car remained stationary at the red light.
El coche permaneció estacionario en el semáforo rojo.
B1 noun /stiːl/

steel

acero
Meaning
a strong, hard metal made of iron and carbon
Example
The building was made from steel to ensure its durability.
El edificio fue hecho de acero para garantizar su durabilidad.
C2 noun /ˈʃaɪstər/

shyster

estafador
Meaning
a person, especially a lawyer, who uses unscrupulous or dishonest methods
Example
The businessman was exposed as a shyster who cheated clients.
El hombre de negocios fue expuesto como un estafador que engañaba a los clientes.
A1 verb /sɔ/

saw

cortar con sierra
Meaning
to cut with a saw; to use a cutting tool
Example
The carpenter saws the wood into pieces.
El carpintero corta la madera en pedazos.
B1 noun ˈsɪs.təmz

systems

sistemas
Meaning
A set of connected things or parts forming a complex whole.
Example
Effective systems improve productivity.
Los sistemas efectivos mejoran la productividad.
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.
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.
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.
A1 noun /skaɪ/

Sky

cielo
Meaning
the region of the atmosphere and outer space seen from the earth
Example
The sky is blue today.
El cielo está azul hoy.
B2 adverb /sɪˈvɪərli/

severely

severamente
Meaning
to a great degree; very seriously or harshly
Example
The patient was severely injured in the accident.
El paciente resultó gravemente herido en el accidente.
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.
B1 noun /ˈsɛkrəteri/

secretary

secretario
Meaning
a person employed to handle correspondence and manage routine tasks for an individual or organization
Example
The secretary scheduled the meeting for tomorrow.
El secretario programó la reunión para mañana.
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.
C2 adjective /spraɪ/

spry

ágil
Meaning
active and lively, especially in old age
Example
The spry grandmother surprised everyone with her quick dance steps.
La abuela ágil sorprendió a todos con sus rápidos pasos de baile.
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.
C1 adjective /ˌsʌb.təˈreɪ.ni.ən/

subterranean

subterráneo
Meaning
Existing, occurring, or done under the earth's surface.
Example
Subterranean water sources help sustain agriculture.
Las fuentes de agua subterráneas ayudan a sostener la agricultura.