brady-youdaoicibaDictYouDict[brady- 词源字典]
medical word-forming element meaning "slow, delayed, tardy," from Greek bradys "slow;" as in bradycardia (1890), with Latinized form of Greek kardia "heart;" bradykinesia, "slow movement," with Greek kinesis "movement, motion;" bradypnea, with Greek pneo/pnein "to breathe."[brady- etymology, brady- origin, 英语词源]