핵

In a sentence

• 핵심적인 문제를 해결해야 합니다.

  We need to solve the core issue.

  Here, '핵' is used as '핵심', meaning 'core', indicating the central and most important aspect of an issue.

• 핵무기의 확산은 심각한 위협입니다.

  The proliferation of nuclear weapons is a serious threat.

  In this sentence, '핵' is used in '핵무기', referring to 'nuclear weapons', demonstrating its meaning related to nuclear energy or power.

• 그는 대화의 핵이 되는 의견을 제시했습니다.

  He presented an opinion that became the core of the discussion.

  Here, '핵' metaphorically represents the central part or essence of something, illustrating how this term can be applied to abstract concepts.