불가결하다

To strictly adhere to or maintain a position, principle, or opinion without changing it.

To be different or distinct from each other. It is a formal term used to describe disparities in opinions, data, or qualities.

A target or specific result that one intends to achieve.

To be enough or adequate in amount, quality, or degree for a particular purpose.

Including all or nearly all elements or aspects of something; wide-ranging or comprehensive.

A thing that blocks one's way or prevents or hinders progress. Used in academic contexts to discuss challenges in development or learning.

A particular procedure for accomplishing or approaching something. Essential for discussing methodology and solutions.

Practical contact with and observation of facts or events. Frequently used in IELTS Speaking to talk about personal history.

The state of being convenient or comfortable for use or living. It often refers to facilities or services that make life easier.

The act of putting a plan, idea, or theory into actual practice or action.