"seal" radical in Chinese characters (Kangxi radical 26)
A rolled-up scroll or kneeling person; compare 卩
《說文》：“卪，瑞信也。守國者用玉卪，守都鄙者用角卪，使山邦者用虎卪，土邦者用人卪，澤邦者用龍卪，門關者用符卪，貨賄用璽卪，道路用旌卪。象相合之形。”