重じゅう大だい問もん題だい

noun

serious problem; grave issue; matter of grave concern

Refers to a problem or question of great importance or severity, often used in formal or news contexts.

• 環かん境きょう破は壊かいは人じん類るいにとって重じゅう大だい問もん題だいだ。

  Environmental destruction is a serious problem for humanity.

• その事じ件けんは国こく際さい的てきな重じゅう大だい問もん題だいに発はっ展てんした。

  The incident developed into a grave international issue.