工具，以及用它上色
這一組還停在具體的層次：一支會噴霧的筆，以及拿它來噴東西的動作。
noun · B2
A tool that sprays paint in a very fine mist, using air pushed through it, so that the colour lands smoothly on a surface and leaves no brush marks.
噴筆
核心畫面
Picture a brush that never touches what it is . Air carries the paint instead, and the colour arrives as a fine mist. Nothing presses on the surface, so there is no line, no edge, and no mark to show where the work was done. One colour simply into the next. That smooth, mark-free surface is what the word keeps carrying, long after anyone has put the tool down.
airbrush 可以想成一支不碰到表面的筆。顏料被空氣吹成細霧，輕輕落下去。沒有刷毛壓過去，所以看不到一條一條的筆…更多收起
airbrush 可以想成一支不碰到表面的筆。顏料被空氣吹成細霧，輕輕落下去。沒有刷毛壓過去，所以看不到一條一條的筆觸。顏色和顏色之間慢慢化開，找不到明顯的邊界。這個「平滑、看不出動過手」的畫面，一路跟著這個字走。後面幾個用法，都可以從這裡看懂。From the word’s history
Wiktionary gives the word as air + brush — a brush whose working part is air. That split matches the modern uses: the air is what lets the colour land without leaving a mark.
Wiktionary 記錄這個字來自 air（空氣）加 brush（筆）。字面就是「以空氣為筆」。這條線索剛好對上它今天的用法：真正碰到表面的是空氣帶著的霧，所以留不下痕跡。
Wiktionary entry for airbrush, kaikki extract source_ref kaikki:3f6f69a190036ae4:1355777621 — etymology_text: From air + brush.
Two branches
把畫面修得比實際好看
噴筆最擅長的就是「蓋過去而看不出接縫」。這個特點被拿來講修照片，再往外延伸到修故事、修記憶。
verb · B2
To change a photo or a picture so that it looks better than the real thing — smoothing skin, taking out marks, and removing anything you do not want people to see.
修圖