"kotumba" meaning in Lingala

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de verbes en lingala",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Lingala",
      "orig": "lingala",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Lingala",
  "lang_code": "ln",
  "pos": "verb",
  "pos_title": "Forme de verbe",
  "raw_tags": [
    "classe 15"
  ],
  "senses": [
    {
      "form_of": [
        {
          "word": "-tumba"
        }
      ],
      "glosses": [
        "Infinitif de -tumba."
      ],
      "id": "fr-kotumba-ln-verb-bDtmD3ij"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ko˩.ˈtu˩.ᵐba˩\\"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "kotumba"
}

{
  "categories": [
    "Formes de verbes en lingala",
    "lingala"
  ],
  "lang": "Lingala",
  "lang_code": "ln",
  "pos": "verb",
  "pos_title": "Forme de verbe",
  "raw_tags": [
    "classe 15"
  ],
  "senses": [
    {
      "form_of": [
        {
          "word": "-tumba"
        }
      ],
      "glosses": [
        "Infinitif de -tumba."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ko˩.ˈtu˩.ᵐba˩\\"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "kotumba"
}