那個弧本身
這一支就是核心畫面，字面意思本身。
noun · C1
A back that rises into a rounded hump: either the upper back of a person that curves forward, or the raised hump over the shoulders of an animal such as a bull or a gnu.
隆起的背
核心畫面
One way to hold humpback is to draw a single line: a back that does not run straight, but lifts into one rounded curve and comes down again. That curve is the whole word. Everything else the word does is a question of what is wearing it — a whale, a person, a hill — and once you can see the line, you can see why one word covers all three.
「humpback」可以想成一條線：一個背不是平的，中間拱起一個圓弧，再落下去。這條弧就是整個字。剩下的差別只在於「…更多收起
「humpback」可以想成一條線：一個背不是平的，中間拱起一個圓弧，再落下去。這條弧就是整個字。剩下的差別只在於「這個弧長在誰身上」——鯨魚、人，還是一座山。只要先把線看清楚，就會懂為什麼同一個字管得了這三件事。From the word’s history
The word is simply hump plus back, so the picture is written into it: a back with a hump.
這個字就是 hump（隆起）加 back（背）拼起來的，所以那個畫面等於直接寫在字面上：一個帶著隆起的背。後面每一個用法，都是這條弧被放到不同的東西上。
Wiktionary (kaikki extract), entry 'humpback': 'From hump + back.', source_ref kaikki:3f6f69a190036ae4:1205554970:28863
Three branches
帶著這個弧的生物
從「那塊背」跳到「背的主人」：不再描述形狀，而是拿形狀當名字。
noun · C1
An old word for a person whose upper back curves forward into a hump. The source marks this use as offensive today; current English says 'a person with a curved spine' or names the condition, kyphosis.
駝背的人
地形上的那條弧
把那條背脊線放大，蓋到山、山脊和小島上。
noun · C1
In descriptive writing, a rounded hill, ridge or island that has the shape of a raised back.
隆起的丘陵