Relating to or characteristic of the Edomites, their culture, language, or the ancient kingdom of Edom.
From 'Edomite' plus the suffix '-ish' (meaning having qualities of). The '-ish' suffix makes adjectives describing cultural or ethnic qualities.
Adding '-ish' to a group name (like 'Edomitish' or 'Turkishish'... wait, that's just Turkish!) shows how English uses this suffix to describe cultural characteristics, though 'Edomite' as an adjective is more common than 'Edomitish.'
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