"do-" meaning in English

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      "expansion": "Etymology tree\nAncient Greek δώδεκᾰ (dṓdekă)bor.\nEnglish dodeca-clip.\nEnglish do-\n[Appendix:Glossary#clipping|Clipping]] of\", \"terms\" : [ { \"children\" : [ { \"keyword_abbrev\" : \"bor.\", \"keyword_label\" : \"Borrowed from\", \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Ancient Greek\", \"term\" : \"δώδεκᾰ\", \"status\" : \"missing\", \"lang\" : \"grc\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"English\", \"term\" : \"dodeca-\", \"status\" : \"ok\", \"lang\" : \"en\" } ], \"keyword\" : \"clipping\" } ], \"lang_name\" : \"English\", \"term\" : \"do-\", \"status\" : \"ok\", \"lang\" : \"en\" }\" data-lang=\"en\" data-title=\"do-\">",
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        "3": "δώδεκα",
        "4": "",
        "5": "twelve"
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      "expansion": "Ancient Greek δώδεκα (dṓdeka, “twelve”)",
      "name": "der"
    }
  ],
  "etymology_text": "Etymology tree\nAncient Greek δώδεκᾰ (dṓdekă)bor.\nEnglish dodeca-clip.\nEnglish do-\nFrom dodeca-, from Ancient Greek δώδεκα (dṓdeka, “twelve”).",
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  "pos": "prefix",
  "senses": [
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        {
          "word": "duo-"
        }
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      "glosses": [
        "Alternative form of duo-"
      ],
      "id": "en-do--en-prefix-rgCQc1sU",
      "links": [
        [
          "duo-",
          "duo-#English"
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        "(chiefly IUPAC) Alternative form of duo-"
      ],
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  "word": "do-"
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  ],
  "etymology_text": "Etymology tree\nAncient Greek δώδεκᾰ (dṓdekă)bor.\nEnglish dodeca-clip.\nEnglish do-\nFrom dodeca-, from Ancient Greek δώδεκα (dṓdeka, “twelve”).",
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          "word": "duo-"
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        "(chiefly IUPAC) Alternative form of duo-"
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