Radical 86 or radical fire (火部) meaning "fire" is one of the 34 Kangxi radicals (214 radicals in total) composed of 4 strokes.

In the Kangxi Dictionary, there are 639 characters (out of 49,030) to be found under this radical.

In the Chinese wuxing ("Five Phases"), 火 represents the element Fire. In Taoist cosmology, 火 (Fire) is the nature component of the Ba gua diagram 離 Lí.

火 is also the 95th indexing component in the Table of Indexing Chinese Character Components predominantly adopted by Simplified Chinese dictionaries published in mainland China, with 灬 being its associated indexing component.

• Oracle bone script character
• Bronze script character
• Large seal script character
• Small seal script character

It also exists as an independent Chinese character. It is one of the Kyōiku kanji or Kanji taught in elementary school in Japan.^[1] It is taught in first grade and means fire.