吐き出す

1. Origins, structure, and basic meaning

• Structure: 吐き出す (はきだす) is a compound transitive verb for expelling stomach contents or emitting material from an interior.
• Basic usage: 食べた物を吐き出した reports vomiting food after feeling ill, while 煙を吐き出している describes a chimney continuously emitting black smoke.

2. Common pitfalls and similar expressions

• Vomiting and mechanical emission
  • The subject of 吐き出す is a person in the first context and 煙突 in the second. 煙を吐き出す should not be rendered as biological vomiting by a chimney.