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buttocks; behind; rump; bottom; hips
undersurface; bottom
last place; end
consequence
「後」 has other readings with different meanings.
転んで尻を強く打った。
I fell and hit my backside hard.
コップのしりが熱い。
The bottom of the cup is hot.
彼はいつも、しりだった。
He was always last.