"mytho-" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "μῦθος"
      },
      "expansion": "Ancient Greek μῦθος (mûthos)",
      "name": "uder"
    }
  ],
  "etymology_text": "From Ancient Greek μῦθος (mûthos).",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prefix",
        "head": "",
        "sort": ""
      },
      "expansion": "mytho-",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "mytho-",
      "name": "en-prefix"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "myth"
      ],
      "id": "en-mytho--en-prefix-tQubOkUF",
      "links": [
        [
          "myth",
          "myth"
        ]
      ],
      "synonyms": [
        {
          "word": "myth-"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "mytho-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "μῦθος"
      },
      "expansion": "Ancient Greek μῦθος (mûthos)",
      "name": "uder"
    }
  ],
  "etymology_text": "From Ancient Greek μῦθος (mûthos).",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prefix",
        "head": "",
        "sort": ""
      },
      "expansion": "mytho-",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "mytho-",
      "name": "en-prefix"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English prefixes",
        "English terms derived from Ancient Greek",
        "English undefined derivations",
        "Pages with 2 entries",
        "Pages with entries",
        "Requests for audio pronunciation in English entries",
        "Requests for pronunciation in English entries"
      ],
      "glosses": [
        "myth"
      ],
      "links": [
        [
          "myth",
          "myth"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "myth-"
    }
  ],
  "word": "mytho-"
}