夾在接縫裡、把東西封住的那一片
這一族就是核心畫面本身：一個實際存在的零件。
noun · B2
A flat piece of material, often rubber, cork or soft metal, that is put between two surfaces where they join and then squeezed tight, so that steam, oil, gas or water cannot leak out.
墊片；密封墊
核心畫面
You can think of gasket as the soft thing that closes a gap so nothing gets out. Two hard parts bolted together never touch perfectly; a thin line of space is always left. Put a layer of rubber or cork in that line, tighten the bolts, and the layer squashes flat until there is no way through. Everything the word does grows out of that one picture: the part itself, what happens when it gives way under pressure, and — on a boat — a band tied round a sail to keep it shut.
gasket 可以想成那片「把縫堵起來、不讓東西跑出去」的軟東西。兩個硬零件鎖在一起，永遠合不到完全密，中間一定留著…更多收起
gasket 可以想成那片「把縫堵起來、不讓東西跑出去」的軟東西。兩個硬零件鎖在一起，永遠合不到完全密，中間一定留著一條細縫。在那條縫裡墊一層橡膠或軟木，把螺絲鎖緊，這一層就被壓扁，堵死所有能鑽出去的路。這個字的每個用法都從這幅畫長出來：那個零件本身、它在壓力下被衝破會怎樣，還有在船上那條把帆束住的帶子。From the word’s history
The source says gasket is perhaps from Middle French garcette. It marks the origin as uncertain, so it is offered here as a possibility rather than a fact.
來源說 gasket 可能來自中古法文 garcette，並且明白標了「可能」。所以這只能當一條參考線索，不能當定論。
Wiktionary (kaikki snapshot 3f6f69a190036ae4), gasket noun/verb entries, etymology_text: "Perhaps from Middle French garcette (gasket), from Old French garce, feminization of garçon." — marked as uncertain by the source.
Three branches
撐不住、被壓力衝破
同一片墊片，換個角度看：不是它守住了，而是它守不住的那一刻。
noun · C1
If a vehicle blows a gasket, one of the seals inside its engine gives way, so steam or gas escapes and the engine cannot run properly.
（引擎）墊片衝壞、漏氣
船上把帆束住的帶子
連結在「束緊、封住」這個動作上；這是理解上的橋，不是資料證實的歷史演變。
noun · C2
On a sailing boat, a length of rope or a band of canvas used to tie a folded sail and hold it in place when the sail is not being used.
束帆索；捲帆帶