- 1
To transact is to carry out business with someone — to do the actual dealing: buying, selling, paying, agreeing. It is a formal word, and in real English it almost always appears in one fixed phrase: 'transact business'.
To transacttransact is to carry out business with someone就是跟某人進行交易——to do the actual dealing: buying, selling, paying, agreeing真正去做那些買、賣、付款、談成的動作。It is a formal word這是一個正式用語，and in real English it almost always appears in one fixed phrase而且在實際的英文裡幾乎都只出現在一個固定用法裡：'transact business''transact business'（辦理業務）。
Banks, contracts, legal documents and company reports use it; people talking about their day do not. If a friend bought a car, they say 'I bought a car', never 'I transacted'.
Banks, contracts, legal documents and company reports use it銀行、合約、法律文件，還有公司報告會用這個字；people talking about their day do not但講自己日常生活的人不會用。If a friend bought a car如果朋友買了一台車，they say 'I bought a car'他們會說'I bought a car'（我買了台車），never 'I transacted'絕不會說'I transacted'。
In computing and finance the word has picked up a slightly wider life — a system that can 'transact' is one that can actually process payments or , not just show information — and you will hear that from engineers and fintech people. Note that the noun 'transaction' is more common than this verb; most will meet 'transaction' hundreds of times before they ever see 'transact'.
In computing and finance the word has picked up a slightly wider life在電腦和金融領域，這個字有了稍微更廣一點的用法——a system that can 'transact' is one that can actually process payments or trades一個能'transact'的系統，是真的能處理付款或交易的系統，not just show information而不只是顯示資訊而已——and you will hear that from engineers and fintech people你會從工程師和金融科技的人口中聽到這種用法。Note that the noun 'transaction' is enormously more common than this verb要注意名詞'transaction'比這個動詞常見得多；most learners will meet 'transaction' hundreds of times before they ever see 'transact'大多數學習者會先遇到'transaction'幾百次，才會看到'transact'這個字。
組成Latin trans- (across) + agere (to drive, to do) → to drive a thing across, to carry it through to the end. English took it back from the noun 'transaction'.
同家族的字
- transactionthe noun — the piece of business done; far more common
- agentsame Latin agere, to do — one who does
- transfersame trans-, to carry across
原始詞典資料4 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。
transactverb/ˌtɹænˈzækt/
- 1
To do, carry through, conduct or perform.
- Therefore in hopes to defray ſome of the Charges he muſt be at, he bought a Sloop, loaded it with ſeveral ſorts of Goods, wherewith the Tinquineſe uſually trade to the neighbouring Iſlands, and putting fourteen Men on board, whereof three were of the Country, he appointed me Maſter of the Sloop, and gave me power to traffick for two Months, while he tranſacted his Affairs at Tonquin.
- Since he understood that wherever business is conducted, those who transact it must dress accordingly, and that where men do not, business suffers, he judged it necessary to enact a strict dress code to reduce the bureaucracy to orderliness and obedience to the mayoral arm.
- 2
To carry over, hand over or transfer something.
- 3
To conduct business.
- 4
To exchange or trade, as of ideas, money, goods, etc.
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。