Take silence and add -er, the ending English puts on the thing that does a job: opener, heater, cooler. A silencer is simply the thing whose job is to turn the noise down. The word does not care what it is fitted to — the end of a gun, the exhaust pipe of a scooter, even a stretch of DNA — and in every case the name promises more than the thing delivers: it quiets, it does not truly silence.
From the word’s history
The source gives the formation directly: silence + -er, with -er traced back through Old English -ere. There is no separate story to tell; the meaning is visible in the parts.
來源資料直接給出它的組成：silence 加上 -er，而 -er 這個字尾可以一路追到古英語的 -ere。它沒有另外的故事，意思就寫在零件上。
Wiktionary entry 'silencer', etymology tree 'From silence + -er' (packet evidence kaikki:3f6f69a190036ae4:1187572892)
登入就可以看每一支怎麼連回核心畫面。