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head
「首」 has other readings with different meanings.
neck
counter for songs and poems
office; official
Obito (hereditary title, often given to powerful regional families)
恥ずかしくはずかしくて首くびを垂れたれた。
I bowed my head in shame.
勝利しょうりに首くびを高くたかくあげて喜んよろこんだ。
I raised my head high in victory.
深くふかく首くびをたれて謝罪しゃざいした。
I bowed my head deeply and apologized.