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 又 is used for “again”. Also this radical 再 is understood as “again, anew” and shows two inverted baskets that are placed on top of each other again.
Vocabulary
履行
lǚ xíng
to fulfill (one's obligations); to carry out (a task); to implement (an agreement); to perform
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or sitting in sun 日 cross-legged 夂 is to be repeated)
