en masseyoudaoicibaDictYouDict[en masse 词源字典]
French, literally "in mass" (see mass (n.1)).[en masse etymology, en masse origin, 英语词源]
masses (n.)youdaoicibaDictYouDict
"people of the lower class," 1836; plural of mass (n.1).
masseur (n.)youdaoicibaDictYouDict
"man who works giving massages," 1876, from French masseur, masc. agent noun from masser (see massage). Native massagist (1889), massager (1921) have not displaced it, though the latter is used in purely mechanical and figurative senses.
masseuse (n.)youdaoicibaDictYouDict
"woman who works giving massages," 1876, from French masseuse, fem. agent noun from masser (see massage).
masseteryoudaoicibaDictYouDict
"A muscle which runs through the rear part of the cheek from the temporal bone to the lower jaw on each side and closes the jaw in chewing", Late 16th century: from Greek masētēr, from masasthai 'to chew'.