"ib" meaning in Sumerian

{
  "head_templates": [
    {
      "args": {
        "1": "sux",
        "2": "romanization",
        "head": ""
      },
      "expansion": "ib",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "ib",
      "name": "sux-rom"
    }
  ],
  "lang": "Sumerian",
  "lang_code": "sux",
  "pos": "romanization",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "ib",
          "word": "𒅁"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Sumerian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Sumerian romanizations",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Romanization of 𒅁 (ib)"
      ],
      "id": "en-ib-sux-romanization-4BR-k4Te",
      "links": [
        [
          "𒅁",
          "𒅁#Sumerian"
        ]
      ],
      "tags": [
        "alt-of",
        "romanization"
      ]
    }
  ],
  "word": "ib"
}

{
  "categories": [
    "Pages with 4 entries",
    "Pages with entries",
    "White Hmong entries with incorrect language header",
    "White Hmong lemmas",
    "White Hmong nouns",
    "White Hmong terms borrowed from Chinese",
    "White Hmong terms derived from Chinese",
    "White Hmong terms derived from Proto-Hmong-Mien",
    "White Hmong terms inherited from Proto-Hmong-Mien",
    "White Hmong terms with IPA pronunciation"
  ],
  "head_templates": [
    {
      "args": {
        "1": "sux",
        "2": "romanization",
        "head": ""
      },
      "expansion": "ib",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "ib",
      "name": "sux-rom"
    }
  ],
  "lang": "Sumerian",
  "lang_code": "sux",
  "pos": "romanization",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "ib",
          "word": "𒅁"
        }
      ],
      "categories": [
        "Pages with 4 entries",
        "Pages with entries",
        "Sumerian entries with incorrect language header",
        "Sumerian non-lemma forms",
        "Sumerian romanizations"
      ],
      "glosses": [
        "Romanization of 𒅁 (ib)"
      ],
      "links": [
        [
          "𒅁",
          "𒅁#Sumerian"
        ]
      ],
      "tags": [
        "alt-of",
        "romanization"
      ]
    }
  ],
  "word": "ib"
}