tomboyyoudaoicibaDictYouDict[tomboy 词源字典]
tomboy: [16] Tomboy originally denoted a ‘rude or boisterous boy’, but before the end of the 16th century it was being applied to a ‘girl who behaves like a boisterous boy’. Tom (the familiar form of Thomas) is presumably being used to denote ‘maleness’ (here ‘typical male aggressiveness’).
[tomboy etymology, tomboy origin, 英语词源]
tomboy (n.)youdaoicibaDictYouDict
1550s, "rude, boisterous boy," from Tom + boy; meaning "wild, romping girl, girl who acts like a spirited boy" is first recorded 1590s. It also could mean "strumpet, bold or immodest woman" (1570s). Compare tomrig "rude, wild girl." Related: Tomboyish.