"helo-" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "-"
      },
      "expansion": "Borrowed from Ancient Greek",
      "name": "bor+"
    }
  ],
  "etymology_text": "Borrowed from Ancient Greek.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prefix"
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      "expansion": "helo-",
      "name": "head"
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  ],
  "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Water",
          "orig": "en:Water",
          "parents": [
            "Liquids",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Forms words related to marshes."
      ],
      "id": "en-helo--en-prefix-OYZjSrGH",
      "links": [
        [
          "marshes",
          "marshes#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "helo-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "-"
      },
      "expansion": "Borrowed from Ancient Greek",
      "name": "bor+"
    }
  ],
  "etymology_text": "Borrowed from Ancient Greek.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prefix"
      },
      "expansion": "helo-",
      "name": "head"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
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        "English lemmas",
        "English prefixes",
        "English terms borrowed from Ancient Greek",
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        "en:Water"
      ],
      "glosses": [
        "Forms words related to marshes."
      ],
      "links": [
        [
          "marshes",
          "marshes#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "helo-"
}