回頭算帳
東西賣出去之後，總得有人把帳算一算。同樣站在買賣這一邊，但角度從「做來賣」換成「賣得動嗎、賺錢嗎」，於是這個字就變成一個評語。
r · B2
In terms of money and business — used to say whether something sells well or makes a profit, as opposed to whether it is good, useful or well made.
在商業上；賺不賺錢
核心畫面
One way to hold this word: it moves the whole sentence onto the buying-and-selling side of life. Picture a thing being made not for the person who makes it, but for a stranger who will pay for it. Follow that thing along: first it is grown, caught or built in quantity because it is meant to be sold; then it reaches a shelf, where anyone can buy it; and at the end someone counts the money and asks whether it paid. Each step is one of the word's uses.
可以想成一個問題：這件事是為了賣嗎？commercially 的工作就是把整句話搬到買賣這一邊。先想像一樣東西做出來…更多收起
可以想成一個問題：這件事是為了賣嗎？commercially 的工作就是把整句話搬到買賣這一邊。先想像一樣東西做出來，不是給自己用，而是給一個會付錢的陌生人。接著跟著它走。第一步，它被大量種、養、捕或做出來，因為本來就是要賣的。第二步，它上了架，一般人買得到了。最後有人把帳算一算，問它到底有沒有賺。這三步，正好就是這個字的三個用法。From the word’s history
Wiktionary records commercially as commercial plus -ly, with commercial borrowed from French. Commercial means to do with trade, and -ly turns it into a word about the way or the angle, so the whole word points at the trade side of whatever is being discussed.
Wiktionary 記錄 commercially 由 commercial 加 -ly 組成，而 commercial 借自法文。commercial 的意思是「跟買賣有關的」，-ly 則把它變成講方式和角度的副詞。所以整個字可以想成：把話題轉到買賣那一邊。
Wiktionary entry for commercially, etymology tree: French commercial (borrowed) > English commercial + -ly (packet source_ref kaikki:3f6f69a190036ae4:1140080996)
From the picture
Also in this word
r · B2
Grown, made, caught or used in large amounts as a business, so that the goods can be sold, rather than for your own use.
商業性地（做來賣的）
r · B2
On sale in shops for anyone to buy — used mostly in the phrase commercially available, about a product that has reached the market.
已上市；買得到