Where did the Xenos label come from? This old Greek term seems to fit better than most descriptions and attitudes.
Adjective
ξένος • (xénos) m (feminine ξένη, neuter ξένον); first/second declension
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foreign
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strange, unusual
Noun
ξένος • (xénos) m (genitive ξένου); second declension
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of parties giving or receiving hospitality: host and much more commonly guest
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stranger
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one who is hired: hired worker, mercenary
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foreigner
Descendants
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English: xeno-
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Greek: ξένος (xénos)