brayoudaoicibaDictYouDict[bra 词源字典]
bra: [20] The word bra made its first appearance in English in the mid 1930s. It is of course an abbreviation of brassiere (an early alternative abbreviated form was bras), which was borrowed from French around 1910. The French term originated in the 17th century, when it meant simply ‘bodice’; it appears to have been an alteration of an earlier, Old French braciere ‘piece of armour for the arm or wrist’ (borrowed into English as bracer in the 14th century), a derivative of bras ‘arm’.
[bra etymology, bra origin, 英语词源]
bra (n.)youdaoicibaDictYouDict
by 1923, shortening of brassiere.