• n. 貿易，交易；行業；職業
• vi. 交易，買賣；以物易物
• vt. 用…進行交換

來自中古英語 trade,路徑，道路，由中世紀德國漢薩同盟商會引入英國的一個詞，來自中古 低地德語 trade,路徑，道路，特指航向，航道，來自 Proto-Germanic*trado,路徑，道路，來自 PIE*der,走，踩踏，詞源同 tread,trip.特指比較固定的路徑，道路，路線，后引申詞義貿易， 交易，行業等，并成為主要詞義，其原詞義現僅見于 trade wind,信風，貿易風。

trade

trade: [14] Trade originally meant ‘way, track’. Not until the 16th century did the modern sense ‘buying and selling’ emerge, via ‘regular path followed by someone’ and ‘business pursued by someone’. Etymologically, it amounts to a ‘trodden’ path; for it was borrowed from Middle Low German trade ‘track’, which goes back ultimately to the prehistoric Germanic base *trad-, *tred-, source also of English tread and trot.
=> tread, trot

trade (n.)

late 14c., "path, track, course of action," introduced by the Hanse merchants, from Middle Dutch or Middle Low German trade "track, course" (probably originally of a ship), cognate with Old English tredan (see tread (v.)).

Sense of "one's habitual business" (1540s) developed from the notion of "way, course, manner of life" (mid-15c.); sense of "buying and selling, exchange of commodities" is from 1550s. Meaning "act of trading" is from 1829. Trade-name is from 1821; trade-route is from 1873; trade-war is from 1899. Trade union is attested from 1831. Trade wind (1640s) has nothing to do with commerce, but preserves the obsolete sense of "in a habitual or regular course."

trade (v.)

1540s, "to tread a path," from trade (n.). Meaning "to occupy oneself (in something)" is recorded from c. 1600. Meaning "to barter" is by 1793. The U.S. sports team sense of "to exchange one player for another" is attested from 1899. Related: Traded; trading. To trade down is attested from 1942; trade up from 1959. Trade places "exchange situations" is from 1917. Trading post is recorded from 1796. Trading stamp, given by merchants and exchangeable for goods, is from 1897.

1. The nature of the polymer is currently a trade secret.

這一聚合物的性質目前是個商業機密。

來自柯林斯例句

2. They issue a fixed number of shares that trade publicly.

他們發行一定數量的可公開交易的股票。

來自柯林斯例句

3. Anita Loos was in many respects untypical of the screenwriting trade.

在許多方面，安妮塔·盧斯看著都不像是從事劇本創作這一行的。

來自柯林斯例句

4. Its trade and industrial policies should be used more ambitiously.

其貿易和工業政策的適用范圍應該擴大。

來自柯林斯例句

5. He passed the letters to the Department of Trade and Industry.

他把信交給了貿工部。

來自柯林斯例句