lessyoudaoicibaDictYouDict[less 词源字典]
less: [OE] In origin, less is a comparative form. It goes back ultimately to Indo-European *loiso- ‘small’, which in prehistoric Germanic had the comparative suffix added to it to produce *laisiz – whence English less. It is not found in any of the other modern Germanic languages.
=> least[less etymology, less origin, 英语词源]
lessyoudaoicibaDictYouDict
Old English læs (adv.), læssa (adj.), comparative of læs "small;" from Proto-Germanic *lais-izo "smaller" (cognates: Old Saxon, Old Frisian les "less;" Middle Dutch lise "soft, gentle," German leise "soft"), from PIE root *leis- (2) "small" (cognates: Lithuanian liesas "thin"). Formerly also "younger," as a translation of Latin minor, a sense now obsolete except in James the Less. Used as a comparative of little, but not related to it. The noun is Old English læsse.