洗了還在
核心問題的第一種答案。水來了，東西沒事：顏色還在、形狀還在、材質還在。這也是這個字最常見的用法。
adjective · B1
Something washable can be washed with water without being damaged, so its colour, shape and material stay the way they were.
可水洗的；耐洗的
核心畫面
Washable can be thought of as an answer to one question: what happens when the water arrives? The ending -able says the thing can take it. But taking it looks different depending on what you are holding. A shirt takes it by still being a shirt afterwards. A marker line takes it by being gone afterwards. One word, one moment, two directions.
washable 可以想成在回答一個問題：水來的時候，會怎麼樣？字尾 -able 說的是「承受得住」。可是承受的樣子…更多收起
washable 可以想成在回答一個問題：水來的時候，會怎麼樣？字尾 -able 說的是「承受得住」。可是承受的樣子，要看你手上拿的是什麼。襯衫的承受，是洗完還是那件襯衫。麥克筆痕跡的承受，是洗完就不見了。同一個字，同一個瞬間，兩個相反的方向。From the word’s history
Wiktionary builds the word as wash + -able, with -able coming through Old French from Latin -ābilis. The core image is just those two pieces read literally: able to take a wash.
Wiktionary 把這個字拆成 wash + -able，而 -able 是經過古法文、從拉丁文 -ābilis 來的。核心畫面其實就是把這兩塊照字面讀：洗得起。
Wiktionary entry 'washable' (packet source_ref kaikki:3f6f69a190036ae4:834531581): etymology tree ending 'From wash + -able.'
Two branches
洗了就沒了
核心問題的另一種答案，方向剛好翻過來。水來了，東西離開：痕跡走掉，底下的布或牆恢復原狀。承受這場水的不再是物品，而是痕跡。
adjective · B2
Used about paint, ink or a marker: it comes out of cloth, or off a surface, when you wash it, so the mark it leaves is not permanent.
洗得掉的