"pro" meaning in Ido

{
  "head_templates": [
    {
      "args": {
        "1": "io",
        "2": "preposition"
      },
      "expansion": "pro",
      "name": "head"
    }
  ],
  "lang": "Ido",
  "lang_code": "io",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Ido entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Ido prepositions",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 24 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "because of"
      ],
      "id": "en-pro-io-prep-Ca1GU7O3",
      "links": [
        [
          "because of",
          "because of"
        ]
      ]
    }
  ],
  "word": "pro"
}

{
  "head_templates": [
    {
      "args": {
        "1": "io",
        "2": "preposition"
      },
      "expansion": "pro",
      "name": "head"
    }
  ],
  "lang": "Ido",
  "lang_code": "io",
  "pos": "prep",
  "senses": [
    {
      "categories": [
        "Ido entries with incorrect language header",
        "Ido lemmas",
        "Ido prepositions",
        "Pages with 24 entries",
        "Pages with entries"
      ],
      "glosses": [
        "because of"
      ],
      "links": [
        [
          "because of",
          "because of"
        ]
      ]
    }
  ],
  "word": "pro"
}