to raise one's head
頍 centers on the action of lifting or raising one's head, often with a sense of alertness or attention.
頍 combines 支 (branch, support) with 頁 (head). The exact historical development is uncertain, but it likely expresses the idea of supporting or raising the head.
The left side 支 looks like a hand holding a branch, and the right side 頁 is a head. Imagine using a branch to prop up a drooping head, raising it to attention.
For キ, picture a key lifting a heavy head: the key turns and the head rises — key -> キ.
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