"по-четверте" meaning in Ukrainian

{
  "forms": [
    {
      "form": "по-четве́рте",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "po-četvérte",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "по-четве́рте"
      },
      "expansion": "по-четве́рте • (po-četvérte)",
      "name": "uk-adv"
    }
  ],
  "lang": "Ukrainian",
  "lang_code": "uk",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Ukrainian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Ukrainian links with redundant alt parameters",
          "parents": [
            "Links with redundant alt parameters",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "uk",
          "name": "Four",
          "orig": "uk:Four",
          "parents": [
            "Numbers",
            "All topics",
            "Terms by semantic function",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "fourthly"
      ],
      "id": "en-по-четверте-uk-adv-mt2vfZjx",
      "links": [
        [
          "fourthly",
          "fourthly"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[pɔ t͡ʃetˈʋɛrte]"
    }
  ],
  "word": "по-четверте"
}

{
  "forms": [
    {
      "form": "по-четве́рте",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "po-četvérte",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "по-четве́рте"
      },
      "expansion": "по-четве́рте • (po-četvérte)",
      "name": "uk-adv"
    }
  ],
  "lang": "Ukrainian",
  "lang_code": "uk",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Ukrainian adverbs",
        "Ukrainian entries with incorrect language header",
        "Ukrainian lemmas",
        "Ukrainian links with redundant alt parameters",
        "Ukrainian multiword terms",
        "Ukrainian sequence adverbs",
        "Ukrainian terms with IPA pronunciation",
        "uk:Four"
      ],
      "glosses": [
        "fourthly"
      ],
      "links": [
        [
          "fourthly",
          "fourthly"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[pɔ t͡ʃetˈʋɛrte]"
    }
  ],
  "word": "по-четверте"
}