erupt · spray

1. Origins, structure, and basic meaning

• Structure: 噴 is associated with spouting liquid or gas; its on-reading is ふん and its kun-reading is ふく.
• Basic usage: 噴水(ふんすい) means fountain, while 噴く(ふく) describes spouting water or emitting something such as smoke.

2. Common pitfalls and similar expressions

• What comes out
  • 湯が勢いよく噴いた means that hot water spouted out forcefully. In 火山が煙を噴く, a volcano emits smoke.