名詞：那件幫倒忙的事
核心畫面裡「放下的那個東西」本身，可以單獨說，也可以放進固定句型。
noun · C1
An act that leaves someone worse off, especially one that was meant to help or that looks like help. It is the opposite of a service.
反效果的作為、幫倒忙的事
核心畫面
One way to hold this word: someone walks toward you carrying help — a review, a compliment, a service, a page of your poems — and what they set down leaves you worse off than before they came. The shape of a service is all there. The direction is reversed. That reversal is what dis- is doing, and it is why the word so often turns up where the harm was not intended.
可以想成這樣一個畫面：有人端著「幫忙」朝你走過來——一篇評論、一句稱讚、一項服務、一頁排好的詩——結果他放下的東西，…更多收起
可以想成這樣一個畫面：有人端著「幫忙」朝你走過來——一篇評論、一句稱讚、一項服務、一頁排好的詩——結果他放下的東西，反而讓你比他來之前更糟。整個「服務」的形狀都在，只是方向反了過來。dis- 做的就是這個翻轉，也因此這個字特別常用在「本意不壞卻害到人」的場合。From the word’s history
The packet's source entry derives disservice from dis- plus service. The prefix reverses the word it joins, so the modern meaning sits exactly where the parts point: the shape of a service, with the result turned the other way.
來源資料說 disservice 由 dis- 加上 service 構成。dis- 把後面的字反過來，所以今天的意思正好落在字面指的位置：形式上是服務，結果卻是反過來的。
Wiktionary entry for disservice supplied in evidence packet (kaikki:3f6f69a190036ae4:1362797901), etymology tree dis- + service
Two branches
動詞：把整句話壓成一個字
同一個畫面直接變成動作，不再需要 do 和 a。
verb · C2
To treat someone or something in a way that harms them or shows them at their worst, for example by giving poor service or poor presentation. It appears most often in the passive: X is disserviced by Y.
使受損、對…服務不周