This is the 9167th most frequent Japanese word.
燃
"燃" means "burn" or "combust" in English.
Here, "燃えています" is the verb form of "燃" meaning "to burn," used to describe an active and ongoing state (present continuous tense) of burning.
この火は明るく燃えています。
This fire is burning brightly.
In this sentence, "燃えている" figuratively conveys the idea of intense enthusiasm or passion, demonstrating the metaphorical usage of "燃".
彼の情熱はまだ燃えている。
His passion is still burning.
"燃えるゴミ" utilizes "燃" as an adjective (modifying "ゴミ") to denote materials that can be incinerated, showing its descriptive application.