"-ubus" meaning in Latin

{
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "suffix form"
      },
      "expansion": "-ubus",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Latin 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"
        }
      ],
      "form_of": [
        {
          "word": "-us for some fourth-declension nouns"
        }
      ],
      "glosses": [
        "dative/ablative/locative plural of -us for some fourth-declension nouns."
      ],
      "id": "en--ubus-la-suffix-o1npovul",
      "links": [
        [
          "-us",
          "-us#Latin"
        ],
        [
          "fourth-declension",
          "Appendix:Latin fourth declension#English"
        ]
      ],
      "raw_glosses": [
        "(uncommon) dative/ablative/locative plural of -us for some fourth-declension nouns."
      ],
      "tags": [
        "ablative",
        "dative",
        "form-of",
        "locative",
        "morpheme",
        "plural",
        "uncommon"
      ]
    }
  ],
  "word": "-ubus"
}

{
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "suffix form"
      },
      "expansion": "-ubus",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Latin entries with incorrect language header",
        "Latin non-lemma forms",
        "Latin suffix forms",
        "Latin terms with uncommon senses",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "form_of": [
        {
          "word": "-us for some fourth-declension nouns"
        }
      ],
      "glosses": [
        "dative/ablative/locative plural of -us for some fourth-declension nouns."
      ],
      "links": [
        [
          "-us",
          "-us#Latin"
        ],
        [
          "fourth-declension",
          "Appendix:Latin fourth declension#English"
        ]
      ],
      "raw_glosses": [
        "(uncommon) dative/ablative/locative plural of -us for some fourth-declension nouns."
      ],
      "tags": [
        "ablative",
        "dative",
        "form-of",
        "locative",
        "morpheme",
        "plural",
        "uncommon"
      ]
    }
  ],
  "word": "-ubus"
}