A prefix or root meaning 'foreign' or 'strange', commonly used in scientific and technical terms.
From Greek xenos meaning 'stranger', 'foreigner', or 'guest'. This root appears in many English words related to foreignness or strangeness, borrowed directly from Greek.
This tiny Greek root packs a punch in English vocabulary - it gives us 'xenophobia' (fear of foreigners), 'xenial' (relating to hospitality), and even 'xenon' (the 'strange' noble gas). Ancient Greeks had a complex relationship with strangers, who could be either threatening enemies or sacred guests under Zeus's protection!
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