Radical 76

Radical 76 or radical lack (欠部) meaning "owe", "", or "yawn" is one of the 34 Kangxi radicals (214 radicals in total) composed of 4 strokes.

In the Kangxi Dictionary, there are 235 characters (out of 49,030) to be found under this radical.

欠 is also the 90th indexing component in the Table of Indexing Chinese Character Components predominantly adopted by Simplified Chinese dictionaries published in mainland China.

Sinogram
As an independent sinogram it is one of the kyōiku kanji or kanji taught in elementary school in Japan. It is a fourth grade kanji.