nomadyoudaoicibaDictYouDict[nomad 词源字典]
nomad: [16] The Greek verb némein had a very wide range of senses. It originally meant ‘deal out, dispense’, a signification mirrored in the derived nemesis [16] (etymologically the ‘dealing out’ of what is due) and the possibly related number. It developed subsequently to ‘inhabit’ and to ‘control, manage’ (which is represented in English economy).

But a further strand was ‘put out to pasture’; and from the same stem as produced némein was formed the adjective nomás ‘wandering about to find pasture for herds or flocks’. Its plural nomádes was used to denote pastoral people who lived in this way, and the word was passed on via Latin nomades and French (singular) nomade into English.
=> economy, nemesis[nomad etymology, nomad origin, 英语词源]
nomad (n.)youdaoicibaDictYouDict
1550s, from Middle French nomade (16c.), from Latin Nomas (genitive Nomadis) "wandering groups in Arabia," from Greek nomas (genitive nomados, plural nomades) "roaming, roving, wandering" (to find pastures for flocks or herds), related to nomos "pasture, pasturage, grazing," literally "land allotted," from PIE root *nem- "to divide, distribute, allot" (see nemesis).