英语词汇词典 | 单词含义、定义和示例
a violent or sudden change or disruption to something
"The company faced a major upheaval after the sudden resignation of its CEO."
continuing without stopping; persistent; tireless
"Her untiring efforts finally led to success."
not true; false or incorrect
"The rumor about the company closing was completely untrue."
An oceanographic phenomenon that involves wind-driven motion of dense, cooler, and nutrient-rich water towards the ocean surface.
"Upwelling brings nutrients to the ocean surface."
not disturbed or affected; firm and steady; unwavering
"Her faith remained unshaken despite all the challenges."
not conforming to the standards expected in a particular profession
"His unprofessional behavior led to his dismissal from the company."
remove wrapping or covering from something; reveal something gradually or clearly
"She carefully unwrapped the gift with excitement."
Not easily broken or giving in to pressure.
"Her unyielding determination helped her overcome all challenges."
The process or cost of maintaining something in good condition.
"The upkeep of the old house is very expensive."
The final result or outcome of a process or situation.
"The upshot of the meeting was that the plan was postponed."
impossible to conceive or imagine; beyond belief or consideration
"It was unthinkable that such a tragedy could happen in our peaceful town."
Showing poor judgment; not sensible or prudent.
"It would be unwise to invest all your money in one company."
in a way that is not typical or expected; to an uncommon degree
"It was unusually cold for this time of year."
not moderated or softened; lacking proper balance or control
"The untempered anger of the crowd caused chaos."
Not worried or disturbed by something; calm and composed.
"She remained unperturbed despite the challenges."
not spoiled or made impure; perfectly clean or pure
"His reputation remained unsullied despite the accusations."
Verb: To cast or throw upward. Noun: Something thrown or directed upward.
"The fisherman upcast his net into the air."
up to the time of
"I will wait until you come back."
likely to change; not steady or secure; unsteady
"The unstable economy made people worried about their jobs."
in a way that shows reluctance or lack of desire; not willingly
"She unwillingly agreed to attend the meeting."
not desired or welcome; not wanted
"He felt like an unwanted guest at the meeting."
to reveal or disclose something, especially in a formal manner
"The company will unveil a new product next week."
To release from a yoke or to free from restraint or obligation.
"The farmer unyoked the oxen after a long day of work."
the quality of being honest and morally correct; integrity
"His uprightness in business dealings earned him great respect."
in a way that requires immediate attention or action
"The patient urgently needs medical attention."
Happening or done at an unsuitable or premature time.
"His untimely death shocked the entire community."
not deserving respect or attention; lacking worth or merit
"He felt unworthy of such praise and recognition."
The process by which towns and cities are formed and become larger as more people begin living and working in central areas.
"Rapid urbanization has led to increased infrastructure development."
situated at the highest place or most important
"Her family's safety was uppermost in her mind during the crisis."
showing strong feeling; forceful, passionate, or intense
"She made a vehement argument against the proposal."
not enjoying the company of others; avoiding social interaction
"He became unsociable after moving to a new city."
To make someone unhappy, worried, or angry.
"The news really upset her."
positioned vertically; morally good and honest
"He remained upright despite the strong winds."
never done or known before; without previous example
"The company reported unprecedented growth last year."
the quality of being useful; practical value or helpfulness
"The usefulness of this tool became apparent during the project."
too bad or shocking to be expressed in words
"The survivors endured unspeakable horrors during the war."
to remove items from a container; to explain or analyze something in detail
"After arriving home, she began to unpack her suitcase."
not officially authorized or confirmed; informal
"The unofficial results showed a close race."
an electrical appliance that uses suction to remove dirt and dust from carpets and floors
"She used the vacuum cleaner to clean the living room carpet."
The action of making practical and effective use of something.
"The efficient utilization of resources is key to success."
To take someone else's position or power illegally or by force.
"He tried to usurp the throne from the rightful king."
A person who is unduly anxious about their health or constantly concerned with minor ailments.
"He was regarded as a valetudinarian, always worrying about his health."
The act of taking someone's power or property illegally or by force.
"The general's usurpation of the presidency led to political unrest."
a substance used to stimulate the body's immune response against diseases
"Children are given the polio vaccine to prevent infection."
Greatest or highest in degree, importance, or extent.
"She showed the utmost respect to her teachers."
habitually or typically occurring or done
"It’s our usual meeting spot."
The student with the highest academic achievements in a graduating class, often chosen to give the farewell speech.
"She was honored as the valedictorian of her class."
to leave or give up a place, seat, or position
"They had to vacate the apartment by the end of the month."
