核心畫面
Picture the moment after a big explosion. The blast is over and the noise has stopped, but dust was thrown high into the sky, and it is still up there. Minutes or days later it begins to come down — on roofs, on fields, on people who thought the trouble had finished. Fallout can be thought of as that late-arriving dust: not the event, but the part of the event that lands on you afterwards.
fallout 可以想成爆炸過後那場慢慢落下來的塵。火光跟巨響那一刻早就過去了。真正的東西還留在高空，要過一陣子才回…更多收起
fallout 可以想成爆炸過後那場慢慢落下來的塵。火光跟巨響那一刻早就過去了。真正的東西還留在高空，要過一陣子才回到地面。落下來的時候，人常常已經以為沒事了。這個字的兩個意思都停在同一個位置：事情結束之後，才輪到你去接住它。From the word’s history
The supplied Wiktionary entry records fallout as a deverbal noun formed from the phrasal verb fall out (fall + out) — literally the stuff that falls out of the sky.
手上的 Wiktionary 資料寫著 fallout 來自片語動詞 fall out（fall + out），是直接由動詞變成的名詞。字面畫面就是「從天上掉出來的東西」，這條線索跟今天兩個意思都對得上。
Wiktionary entry for fallout, kaikki extract source_ref kaikki:3f6f69a190036ae4:1116534998:32348 — etymology_text: “Deverbal from fall out; fall + out.”