熱狂

1. Origins, structure, and basic meaning

• Structure: 熱狂 (ねっきょう) means intense excitement or fervor. 熱狂した is an audience reaction; 熱狂の余韻 is an atmosphere remaining afterward.
• Basic usage: Spectators become excited by a final; the emotional afterglow remains after a stage performance.

2. Common pitfalls and similar expressions

• Frenzy during an event and excitement lingering afterward
  • The trigger takes に; の links the emotion to its afterglow. The second sentence does not state that active frenzy itself continues.