In the historical Chinese dictionary Longkan Shoujian (龍龕手鑑), this character is written in the form of ⿰亻夲.
体 (radical 9, 人+5, 7 strokes, cangjie input 人木一 (ODM), four-corner 25230, composition ⿰亻本)
Phono-semantic compound (形聲, OC *bɯːnʔ): semantic 亻 (“person”) + phonetic 本 (OC *pɯːnʔ).
This character was originally an alternative form of 笨 as used in Chinese. This usage now appears to be obsolete, at least in Japanese, where 体 and 笨 are distinct characters and are not interchangeable. See the Chinese 体 and Japanese 笨 entries for further details.