"xero-" meaning in Italian

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "grc",
        "3": "ξηρός",
        "4": "",
        "5": "dry"
      },
      "expansion": "Ancient Greek ξηρός (xērós, “dry”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek ξηρός (xērós, “dry”).",
  "head_templates": [
    {
      "args": {
        "1": "it",
        "2": "prefix"
      },
      "expansion": "xero-",
      "name": "head"
    }
  ],
  "hyphenation": [
    "xè‧ro-"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "xero- (all senses)"
      ],
      "id": "en-xero--it-prefix-Wu6XIv3v",
      "links": [
        [
          "xero-",
          "xero-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌksɛ.ro/"
    }
  ],
  "word": "xero-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "grc",
        "3": "ξηρός",
        "4": "",
        "5": "dry"
      },
      "expansion": "Ancient Greek ξηρός (xērós, “dry”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek ξηρός (xērós, “dry”).",
  "head_templates": [
    {
      "args": {
        "1": "it",
        "2": "prefix"
      },
      "expansion": "xero-",
      "name": "head"
    }
  ],
  "hyphenation": [
    "xè‧ro-"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Italian 2-syllable words",
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian prefixes",
        "Italian terms derived from Ancient Greek",
        "Italian terms spelled with X",
        "Italian terms with IPA pronunciation"
      ],
      "glosses": [
        "xero- (all senses)"
      ],
      "links": [
        [
          "xero-",
          "xero-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌksɛ.ro/"
    }
  ],
  "word": "xero-"
}