strong winds that blow all the time towards the equator and then to the west 信风，贸易风（稳定吹向赤道再向西） The trade winds originate in the South Pacific. 信风源自南太平洋。
Word Originmid 17th cent.: from the phrase blow trade ‘blow steadily in the same direction’. Because of the importance of these winds to navigation, 18th-cent. etymologists mistakenly connected the word trade with “commerce”.