Tariff is an Arabic word — ta'rifa, a notification, a list of what you owe. It crossed the Mediterranean in the ledgers of merchants and never went home. So did bazaar, from Persian, and caravan, the long chain of camels that carried both the goods and the word for the goods.
This is what trade does. We think of commerce as the movement of things — spices, silk, silver — but every cargo carried a second, lighter freight: the names. A merchant who buys pepper has to say pepper, and if his word is better, or just first, it stays. The history of trade is written in the receipts, and the receipts are written in borrowed words.
You can almost map the old routes by etymology alone. Follow sugar back through Italian and Arabic to the Sanskrit sharkara and you have traced a sea lane that predates every modern border. The word remembers a journey the map forgot.
What moves me about these word origins is how ordinary they are. Nobody set out to spread a language. A trader wanted to be understood, made a deal, moved on. The word stayed behind in someone else's mouth, and a thousand such small transactions, repeated across centuries, built the vocabulary of commerce we use without a thought.
We say a word is borrowed, as if it might be returned. It won't be. Trade is the one exchange where both parties keep what they were given.