這個拼法底下其實是2個不同的字，意思沒有關係， 只是長得一樣。下面分開列出來。跳到 煤渣；熔結的硬塊 · 走音的音；破音
Fire hot enough to go past burning. Instead of falling to soft grey ash, the material melts, sticks to itself, and cools into a lump that is dense, dark and a little glassy. Strike it and it rings. That ring is where the name comes from, and it is the test the picture rests on: ash is dull and powdery, clinker is hard and sounds like stone.
Wiktionary gives Dutch klinkaerd, later klinker, from klinken 'to ring, resound'. The material is named after the sound it makes when it is struck, which is exactly what separates it from ash.
本批資料的詞源欄給的是荷蘭文 klinkaerd、後來的 klinker，來自 klinken（發出響聲、鳴響）。這種材料是用它被敲到時的聲音命名的，而這正好就是它跟灰最大的不同。
Wiktionary etymology_text supplied in packet, source_ref kaikki:3f6f69a190036ae4:1020029652:12095
From the picture
高溫燒出來的硬塊
這一族完全踩在核心畫面上：熔過、冷掉、變硬。差別只在這塊硬東西是誰燒的、拿來做什麼。
noun · C2
The hard stony lumps left behind when coal or a similar fuel has burned at a very high heat in a fire, stove, furnace, boiler or kiln. The ash melts, sticks together, and goes hard again as it cools.
煤渣；熔結的硬塊
noun · C2
A very hard brick, fired until its surface turns glassy, used for paving paths, yards and roads. Bricks like this were first made in the Netherlands.
硬燒磚；鋪路用的磚
noun · C2
In cement making: the hard grey nodules that come out of a kiln after limestone and clay have been heated together, and that are then ground into powder to make cement.
水泥熟料
noun · C2
Rough, broken, hardened lava — the loose sharp rock that covers the ground on and around a volcano.
火山熔岩碎塊
A second word, same spelling
The one that everybody hears. In a run of things that are going fine, something comes out wrong and announces itself — nobody has to be told it happened. Wiktionary files this group under clink + -er, 'something that clinks', and records the general slang meaning 'a mistake or blunder', which is the shape both of these senses take.
Wiktionary's second etymology for clinker is clink + -er, 'someone or something that clinks', and lists a slang sense 'a mistake or blunder' under it. That is a separate route from the Dutch klinker of the burnt-lump senses, even though both go back to a sound.
本批資料的第二條詞源把 clinker 拆成 clink + -er（會發出叮聲的人或東西），並在底下收了一個俚語義「錯誤、失誤」。這跟煤渣那條荷蘭文 klinker 是不同的路線，雖然兩邊追到最後都跟聲音有關。
Wiktionary etymology_text (etymology_number 2) supplied in packet, source_ref kaikki:3f6f69a190036ae4:1020044218:5511
One branch
明顯出錯的那一個
兩個意思是同一件事的兩種尺度：小到一個音，大到一整部作品。
noun · C2
A wrong note in a piece of music, played or sung loudly enough that everyone hears it.
走音的音；破音