노력

Having great importance, significance, or consequence; critical.

To be required or demanded as a necessary condition or action.

To correspond to, be applicable to, or fall under a certain category or value.

To be insufficient, lacking, or not enough in quantity, quality, or ability.

The center of interest or activity; the point where light rays meet (optics). In discussion, it refers to the main point of concentration.

A cause, explanation, or justification for an action or event.

Existing, occurring, or carried on between two or more nations. It relates to global relations and standards.

To experience or undergo something personally. To gain knowledge or skill by doing or seeing something.

To have the same opinion as someone else or to give permission/agreement to a proposal.

The act of picking one option among several possibilities. In academic contexts, it refers to consumer choice, policy selection, or research methodology decisions.