悬念 has two main meanings: (1) suspense in a story, film, or play — the feeling of anticipation about what happens next; (2) a feeling of concern or worry about someone's well-being, often a lingering worry in your heart. For the 'concern' sense, 悬念 is about a deep, emotional worry, while the near-synonym 顾虑 (gù lǜ) refers to hesitation or misgivings about doing something (e.g., 'I have 顾虑s about accepting the job').