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A headlock is a hold in fighting sports: you wrap your arm around someone’s head and neck and lock them there so they cannot move freely. Wrestlers and some martial-arts teachers use the word as a noun and as a verb (to headlock someone). It is physical and informal; it is not a hug and not a gentle “hold.” In a story it can also be a street fight, not only a sport. Though actually, lock here means “a hold that will not open,” like a lock on a door — the arm is the lock, and the head is what is caught.
鎖頭、頭鎖（摔角裡用手臂鎖住對方的頭頸）
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
headlocknoun
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A wrestling move where the attacker puts their arm tightly round their opponent's head, from which the opponent cannot easily escape.
- Your love is like a studded leather headlock Your kiss, it could put creases in the rain You're rarer than a can of dandelion and burdock And those other girls are just post-mix lemonade
headlockverb
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To restrain in a headlock.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。