燃える

1. Origins, structure, and basic meaning

• Structure: 燃える (もえる) is an ichidan intransitive verb for material burning after it catches fire.
• Basic usage: 枝は燃える states the general burning behavior of dry branches in the nonpast form, while 炎が燃えている describes flames currently burning in the distance.

2. Common pitfalls and similar expressions

• General burning and ongoing combustion
  • 燃える can express a general or repeatable fact, whereas 燃えている marks combustion continuing at the observation time. Both inputs concern literal fire only, not figurative enthusiasm or emotion.