割り込む

1. Origins, structure, and basic meaning

• Structure: The godan compound verb 割り込む (わりこむ) means cutting into a queue or intruding into a conversation.
• Basic usage: The place entered takes に, as in 列に割り込む and 会話に割り込む.

2. Common pitfalls and similar expressions

• Cutting into a line or conversation
  • It implies entering an ongoing flow without invitation and is more disruptive than neutral joining.