This radical has actually the meaning: corpse 尸. But due to its use in tail 尾, urine 尿, or flatulence 屁, it is considered to generally mean 'buttocks'.
This character means: Spoon. - In the explanations it is typically used as a sitting person. (Further radicals with „person“ are: sitting cross-legged 夂, lying , kneeling ⺈, skilled 才, bending マ,卩, slumped 㔾 or husband 夫)
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, kneeling 
