急に

1. Origins, structure, and basic meaning

• Structure: 急に (きゅうに) is an adverb meaning suddenly or without warning.
• Basic usage: 急に雨が降り始める modifies an abrupt weather change; 急に名前を呼ばれる modifies an unexpected passive event.

2. Common pitfalls and similar expressions

• Adverb modifying event onset
  • The adverb modifies the onset of 降り始める and 呼ばれる, not the nouns rain or name.