You can think of tainted as one drop falling into something clean and spreading through it. The drop is small, and after a second you cannot see where it went — but you also cannot take it back out. From then on the whole thing is under suspicion, not just the part the drop landed on. That is why the word feels heavier than damaged: nothing has to be broken for everything to become .
From the word’s history
The packet's source entry derives tainted from the verb taint plus -ed, so the word always describes a state that something else caused: it has been touched, and the touch stayed.
資料來源把 tainted 記成動詞 taint 加上 -ed。所以它描述的一直是「被弄過」之後的狀態，不是東西本來的樣子——重點不在它是什麼，而在有東西碰過它，而且碰過的痕跡留下來了。
Wiktionary entry supplied in this packet (kaikki extract, source_ref kaikki:3f6f69a190036ae4:324009739): 'From taint + -ed.'
登入就可以看每一支怎麼連回核心畫面。