core

B2 · Upper Intermediate Countable noun

n. the most important or central part of a system, organization, or idea.

n. the foundational or most essential part of an aggregate, system, or abstract concept; the essence.

日本語:中核※

“The core of the problem is that we don't have enough money.”

“At the core of his philosophical argument lies the belief that individual liberty must always outweigh collective security.”

B2 · Upper Intermediate Countable noun Science

n. the central part of a planet or star, which is often very hot or solid.

n. the innermost layer of a celestial body, such as the Earth's molten outer core and solid inner core.

日本語:核※

“Scientists study the Earth's core to understand the planet's magnetic field.”

“The fusion reactions occurring within the star's core generate the immense pressure required to prevent gravitational collapse.”

C1 · Advanced Countable noun Computing Technical

n. one of the independent processing units in a computer's CPU.

n. an independent processing unit within a central processing unit (CPU) that can execute program instructions.

“This new laptop has a processor with eight cores for faster performance.”

“The software is optimized for multi-core architectures, allowing it to distribute heavy workloads across several processing units simultaneously.”

B2 · Upper Intermediate Academic

adj. describing the most important or basic parts of something.

adj. constituting the essential, foundational, or most significant part of a whole.

“Math and English are core subjects that every student must take.”

“The company decided to sell its secondary businesses to focus on its core competencies and long-term stability.”

C1 · Advanced Technical

v. to take the center part out of a fruit.

v. to remove the central part or seeds from a fruit; to extract a cylindrical sample from a larger mass.

“You should peel and core the pears before boiling them in the syrup.”

“The geologists spent the afternoon coring the glacier to obtain ice samples for climate analysis.”