字面：植物裡的汁液
畫面本身，字面照用。
adjective · C1
Full of sap, the watery liquid inside a living plant. It is used of wood, stems, and young shoots that are still fresh and wet inside.
多汁液的；充滿樹液的
核心畫面
One way to picture it: a branch snapped off a living tree, with a thick sweet liquid welling up at the break. The centre of the word sits in that liquid — wet, sweet, and coming out of something rather than put on it. Said of a plant it stays literal. Said of a song or a card it describes feeling that oozes the same way.
可以想成一根剛折斷的樹枝，斷口滲出一層又黏又甜的汁。整個字的中心比較像那股汁：濕、甜，而且是從裡面自己滲出來的，不是…更多收起
可以想成一根剛折斷的樹枝，斷口滲出一層又黏又甜的汁。整個字的中心比較像那股汁：濕、甜，而且是從裡面自己滲出來的，不是外面抹上去的。用在植物上，它就停在字面：汁液很多。用在歌或卡片上，它形容的是同樣滲出來的那種感情——甜得有點黏手。From the word’s history
The packet derives sappy from Middle English sappy, Old English saepig (full of sap, succulent), that is sap plus -y, with juicy cognates across Germanic. The sentimental use is a later development in American English and is presented here as a way of remembering the link, not as documented history.
資料顯示 sappy 來自古英文 sæpiġ，也就是 sap（樹液）加 -y，本義是「汁液多的、多汁的」，同源字在荷蘭文、德文、瑞典文裡也都是「多汁」。至於「肉麻」那一層，把它想成從「甜汁」延伸出去，只是方便記憶的說法；這份資料只證明兩個意思共用同一個字源，沒有記錄中間那段路怎麼走的。
Wiktionary etymology 1 supplied in this packet (source_ref kaikki:3f6f69a190036ae4:1241681406): 'From Middle English sappy, sapy, from Old English saepig (full of sap, succulent), equivalent to sap + -y.'
Two branches
比喻：甜到黏手的感情
把「甜汁滲出來」的感覺搬到感情的表達方式上。這是理解上的連結，不是已證實的歷史路線。
adjective · B2
Full of sweet, soft feeling in a way that goes too far, so a song, film, card, or speech pours love out so thickly that it feels silly rather than moving.
肉麻的；濫情的