immalleableyoudaoicibaDictYouDict[immalleable 词源字典]
"Not malleable; (originally) literal incapable of being hammered out or beaten; (in later use also of a person, the mind, etc.) unchangeable, obstinate, unyielding", Mid 17th cent.; earliest use found in John French (?1616–1657), physician. From im- + malleable, originally after post-classical Latin immalleabilis.[immalleable etymology, immalleable origin, 英语词源]