早口

1. Origins, structure, and basic meaning

• Structure: 早口 (はやくち) combines fast 早 and mouth or speech 口 to denote rapid speaking.
• Basic usage: It describes speech speeding up from nervousness or a clerk talking too quickly to follow.

2. Common pitfalls and similar expressions

• Speed rather than conceptual difficulty
  • 早口 evaluates the pace of delivery; even simple content can be hard to understand when spoken too rapidly.