trayyoudaoicibaDictYouDict[tray 词源字典]
tray: see tree
[tray etymology, tray origin, 英语词源]
tray (n.)youdaoicibaDictYouDict
Old English treg, trig "flat wooden board with a low rim," from Proto-Germanic *traujam (cognates: Old Swedish tro, a corn measure), from PIE *drou-, variant of *deru-, forming words refering to objects made of wood (see tree (n.)). The primary sense may have been "wooden vessel."