波及

1. Origins, structure, and basic meaning

• Structure: 波及 is read as はきゅう and can mean “spread” or “repercussion”, depending on context.
• Basic usage: The examples show one delay affecting a whole group and harbor unrest spreading to nearby villages.

2. Common pitfalls and similar expressions

• Distinguishing senses and uses
  • It is an effect or change spreading outward like ripples; に marks what is affected and にも emphasizes extension to another area.