馬具：套住頭的帶子
圈套在動物頭上，於是有了東西本身和把它套上去的動作。
noun · C1
A set of ropes or leather straps that goes round the head of a horse or a cow, with a rope to hold, used to lead the animal or tie it up. It has no metal bar for the mouth.
籠頭；韁套
核心畫面
Picture a loop that goes round a head or a neck and at the back. It does not grip and it does not go inside anything — it just sits there, and whatever it is round stays held. On a horse that loop is straps over the nose and behind the ears, with a rope for your hand. On a person the same loop goes round the neck, ties at the back, and holds up a top with nothing over the shoulders. One shape, two very different places to put it.
halter 可以想成一個繞過頭或脖子、在後面扣起來的圈。它不夾緊，也不伸進任何東西裡面，就只是套在那裡，被套住的東…更多收起
halter 可以想成一個繞過頭或脖子、在後面扣起來的圈。它不夾緊，也不伸進任何東西裡面，就只是套在那裡，被套住的東西就跑不掉。套在馬身上，這個圈是鼻子上方和耳朵後面的帶子，旁邊接一條牽繩。套在人身上，同一個圈繞過脖子、在後面綁起來，把一件肩膀上沒有帶子的上衣撐住。形狀是同一個，只是套的位置差很多。From the word’s history
The source traces halter to Middle English halter, Old English hælfter, and a West Germanic word meaning harness. The animal gear is the older use; the clothing is named after the same shape.
來源把 halter 追到中古英語 halter、古英語 hælfter，再往上到一個西日耳曼語表示「馬具」的字。所以馬具是這個字比較老的一面。衣服那個意思借的是同一個形狀的名字，這是形狀上的聯想，不是另一條字源。
Wiktionary, halter (etymology 1), supplied in packet (kaikki:3f6f69a190036ae4:1093162438)
Two branches
衣服：繞過脖子的領型
同樣的圈換到人的脖子上，名字就跟著搬過來了。
noun · C1
A woman's top that is held up by a strap or a tie behind the neck, leaving the shoulders, arms and back uncovered. Also called a halter top.
露背上衣；掛脖上衣