整個重重落下
這一支就是那個「噗通」的聲音本身：重量一次交出去，落點在哪就在哪。
plump, verb, plop down · verb · C2
To sit down suddenly and heavily, as if your whole body falls into the seat.
一屁股坐下
這個拼法底下其實是2個不同的字，意思沒有關係， 只是長得一樣。下面分開列出來。跳到 plump, verb, plop down · plump, round and full
1
plump
v核心畫面
One way to hold it: something soft dropping in one heavy motion and landing with a dull 'plop' — the word the sound. The weight goes down all at once, without care and without grace.
一個有重量的東西「啪」地一下整個落下去，沒有緩衝、沒有講究，落地時發出悶悶的一聲。這個動詞其實是狀聲詞——plump…更多收起
一個有重量的東西「啪」地一下整個落下去，沒有緩衝、沒有講究，落地時發出悶悶的一聲。這個動詞其實是狀聲詞——plump、plop、plonk 是同一家人，聲音本身就是意思。所以它的重點不在「移動」，而在那個「一次到位、砰的一下」的乾脆感：不是慢慢坐、慢慢放，是整個交出去讓重力接手。From the word’s history
The verb comes from Middle English 'plumpen', related to Middle Dutch 'plompen' and German 'plumpsen' — all imitative of the dull sound a heavy soft thing makes when it drops into water or onto a surface. The sound is the meaning.
這個動詞來自中古英語 plumpen，和中古荷蘭語 plompen、德語 plumpsen 同源，全都是模仿「重物落下」發出的那個悶響。也就是說，這個字是聲音變成的：先有那一聲「噗通」，才有「一屁股坐下」「隨手一放」。這也解釋了為什麼它聽起來一點都不優雅——它本來就是在描述聲音，而那個聲音就是不優雅的。
Wiktionary, 'plump' (verb, from Middle English plumpen; akin to Middle Dutch plompen, German plumpsen — imitative)
Two branches
讓東西鼓起來、變飽滿
這一支和「重重落下」不是同一條路：它借的是形容詞 plump（飽滿）的畫面，指的是「使某物變得飽滿」，而不是那個噗通的聲音。英語裡這兩層剛好長成同一個拼字，理解時分開放比硬接在一起清楚。
plump, verb, fluff up cushions · verb · C2
To hit cushions or pillows in a soft way so they become rounder and softer.
拍鬆
A second word, same spelling
2
plump
a核心畫面
One way to picture it: something filled out from the inside until it is round and softly firm — a cushion you have just fluffed, a grape about to burst. Full, not hard; rounded, not sharp.
某個東西從裡面被填滿了，撐得圓圓的、軟軟的、有彈性——剛拍鬆的抱枕、飽水的葡萄、烤好膨起來的麵包。重點是「由內往外撐…更多收起
某個東西從裡面被填滿了，撐得圓圓的、軟軟的、有彈性——剛拍鬆的抱枕、飽水的葡萄、烤好膨起來的麵包。重點是「由內往外撐出來的飽滿」：它不是硬的，你按下去會凹，但它會彈回來；它也不是尖的、瘦的、有稜角的，而是每一處線條都往外鼓。這個字看什麼東西都帶著一種舒服的感覺，因為飽滿在人的眼裡通常代表健康、充足、剛剛好。From the word’s history
The adjective was borrowed into Middle English from Middle Dutch/Middle Low German 'plomp/plump', which originally meant blunt, clumsy, coarse — the opposite of sharp or fine. English kept the 'not sharp, rounded out' half of that and dropped the insult, so the modern word describes fullness rather than crudeness.
這個形容詞是中古英語向中古荷蘭語／中古低地德語借來的 plomp/plump，原意是「鈍的、笨拙的、粗糙的」——也就是「不尖銳、不細緻」。英語留下了「不尖、圓鈍」這一半，把「粗魯」那一半丟掉了，於是變成今天描述「飽滿」的字。知道這個來源，就能理解為什麼 plump 永遠不會用來形容線條俐落的東西：它從一開始就站在「尖」的反面。
Wiktionary, 'plump' (adjective, from Middle English plump/plompe, borrowed from Middle Dutch plomp or Middle Low German plump)
One branch
圓而飽滿的外形
這一支直接就是核心畫面：從裡面撐出來的圓潤。差別只在於眼前的東西是物，還是人。
plump, round and full · adjective · C2
Round and full in a way that looks attractive, used about things such as fruit, cushions, or pillows.
飽滿
原始詞典資料15 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
Plumpname
- 1
A surname from German.
plumpadj詞源 1/plʌmp/
- 1
Having a full and rounded shape; chubby, somewhat overweight.
- a plump baby; plump cheeks
- The god of wine did his plump clusters bring.
- 2
Sudden and without reservation; blunt; direct; downright.
- We are averse to plump queries, but we are going to ask our readers a plain, simple question Did you ever see a paper y'clept "The Yankee Blade?"
- After the plump statement that the author was at Erceldoune and spake with Thomas.
- 3
beveragesfoodlifestyleOf a wine: giving the sensation of filling the mouth.
- A plump wine, with an abundance of plum and berry characteristics and soft, round tannins. Easy to drink; ready on release.
plumpverb詞源 1/plʌmp/
- 1
To grow plump; to swell out.
- Her cheeks have plumped.
- 2
To make plump; to fill (out) or support; often with up.
- to plump oysters or scallops by placing them in fresh or brackish water
- to plump up the hollowness of their history with improbable miracles
- 3
To give a plumper (kind of vote).
- 4
To give (a vote), as a plumper.
- 5
To favor or decide in favor of.
- A recent poll by the New York Times found that although most Brazilians plump for arch-rival Argentina as the team they most want to lose, the second-biggest group want Brazil itself to stumble.
plumpverb詞源 2/plʌmp/
- 1
To cast or let drop (something) all at once, suddenly and heavily.
- to plump a stone into water
- 2
To drop or fall suddenly or heavily, all at once.
- September 24, 1712, The Spectator No. 492, letter from a prude Dulcissa plumps into a chair.
plumpadv詞源 2/plʌmp/
- 1
Directly; suddenly; perpendicularly.
- I suppose then, that going plump on a flying whale with your sail set in a foggy squall is the height of a whaleman’s discretion?
plumpnoun詞源 2/plʌmp/
- 1
The sound of a sudden heavy fall.
- As she beheld her, poor Mrs. Mack's heart fluttered up to her mouth, and then dropped with a dreadful plump, into the pit of her stomach.
plumpnoun詞源 3/plʌmp/
- 1
obsoleteA knot or cluster; a group; a crowd.
- a plump of trees, fowls, or spears
- To visit islands and the plumps of men.
- 2
A group of ducks or geese migrating, or sometimes other groups of birds.
- What Descartes called res cogitans is not a defined res but a network, a swarm, a cloud, much like a plump of geese flying south or ants foraging around their woodlands.
- A great example of professionalism in aviation: on the afternoon of January 15, 2009, in the middle of wintertime, a big plump of geese were flying south, getting off of the strong cold weather.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。