Radical 116

Radical 116 or radical cave (穴部) meaning "cave" is one of the 23 Kangxi radicals (214 radicals in total) composed of 5 strokes.

In the Kangxi Dictionary, there are 298 characters (out of 49,030) to be found under this radical.

穴 is also the 117th indexing component in the Table of Indexing Chinese Character Components predominantly adopted by Simplified Chinese dictionaries published in mainland China.

Variant forms
This radical character takes different forms in different languages. In the Kangxi Dictionary, the first stroke is a vertical dot, and the last stroke of the radical character starts with a short horizontal line when appearing independently (穴), and becomes a vertical-curve-horizontal stroke ㇄ when used as an upper component, with an exception of 空 in which the radical's last stroke starts with a short horizontal line (穴+工). In Japanese and Korean hanja, when used as an upper component, the last stroke of the radical character is a vertical-curve-hook stroke ㇟. In Traditional Chinese used in Taiwan and Hong Kong, its last stroke is a vertical-curve-horizontal stroke ㇄. In Mainland China's xin zixing, it is a rightward dot.

Sinogram
The radical is also used as an independent Chinese character. It is one of the Kyōiku kanji or Kanji taught in elementary school in Japan. It is a fifth grade kanji.