"aero-" meaning in Spanish

{
  "etymology_templates": [
    {
      "args": {
        "1": "es",
        "2": "grc",
        "3": "ἀέρος"
      },
      "expansion": "Ancient Greek ἀέρος (aéros)",
      "name": "der"
    },
    {
      "args": {
        "1": "grc",
        "2": "ἀήρ",
        "3": "",
        "4": "air"
      },
      "expansion": "ἀήρ (aḗr, “air”)",
      "name": "m"
    }
  ],
  "etymology_text": "From Ancient Greek ἀέρος (aéros), the genitive singular of ἀήρ (aḗr, “air”).",
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "prefix"
      },
      "expansion": "aero-",
      "name": "head"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "aero-"
      ],
      "id": "en-aero--es-prefix-sTk6Px6m",
      "links": [
        [
          "aero-",
          "aero-#English"
        ]
      ],
      "related": [
        {
          "word": "aire"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "aero-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "es",
        "2": "grc",
        "3": "ἀέρος"
      },
      "expansion": "Ancient Greek ἀέρος (aéros)",
      "name": "der"
    },
    {
      "args": {
        "1": "grc",
        "2": "ἀήρ",
        "3": "",
        "4": "air"
      },
      "expansion": "ἀήρ (aḗr, “air”)",
      "name": "m"
    }
  ],
  "etymology_text": "From Ancient Greek ἀέρος (aéros), the genitive singular of ἀήρ (aḗr, “air”).",
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "prefix"
      },
      "expansion": "aero-",
      "name": "head"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "prefix",
  "related": [
    {
      "word": "aire"
    }
  ],
  "senses": [
    {
      "categories": [
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish prefixes",
        "Spanish terms derived from Ancient Greek"
      ],
      "glosses": [
        "aero-"
      ],
      "links": [
        [
          "aero-",
          "aero-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "aero-"
}