"cén" meaning in Irish

{
  "etymology_text": "Contraction of cé + an.",
  "forms": [
    {
      "form": "cé na",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "of a following feminine noun",
      "tags": [
        "triggers-lenition"
      ]
    },
    {
      "form": "cia an",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "determiner",
        "3": "plural",
        "4": "cé na",
        "cat2": "interrogative determiners"
      },
      "expansion": "cén (plural cé na)",
      "name": "head"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "det",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Irish determiners",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Irish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Irish interrogative determiners",
          "parents": [
            "Interrogative determiners",
            "Determiners",
            "Interrogative pro-forms",
            "Lemmas",
            "Pro-forms",
            "Terms by semantic function"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "english": "where?",
          "word": "cén áit"
        },
        {
          "english": "how?",
          "word": "cén chaoi"
        },
        {
          "english": "how?",
          "word": "cén dóigh"
        },
        {
          "english": "why?",
          "word": "cén fáth"
        },
        {
          "english": "when?",
          "word": "cén uair"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              0,
              3
            ]
          ],
          "english": "What day of the week is it?",
          "text": "Cén lá den tseachtain é?",
          "type": "example"
        },
        {
          "bold_text_offsets": [
            [
              0,
              3
            ]
          ],
          "english": "Which woman is that?",
          "text": "Cén bhean í sin?",
          "type": "example"
        }
      ],
      "glosses": [
        "what, which"
      ],
      "id": "en-cén-ga-det-Td4Sb7x2",
      "links": [
        [
          "what",
          "what"
        ],
        [
          "which",
          "which"
        ]
      ],
      "raw_glosses": [
        "(interrogative) what, which"
      ],
      "tags": [
        "interrogative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ceːnˠ]"
    }
  ],
  "word": "cén"
}

{
  "categories": [
    "Hanyu Pinyin",
    "Pages with 2 entries",
    "Pages with entries"
  ],
  "derived": [
    {
      "english": "where?",
      "word": "cén áit"
    },
    {
      "english": "how?",
      "word": "cén chaoi"
    },
    {
      "english": "how?",
      "word": "cén dóigh"
    },
    {
      "english": "why?",
      "word": "cén fáth"
    },
    {
      "english": "when?",
      "word": "cén uair"
    }
  ],
  "etymology_text": "Contraction of cé + an.",
  "forms": [
    {
      "form": "cé na",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "of a following feminine noun",
      "tags": [
        "triggers-lenition"
      ]
    },
    {
      "form": "cia an",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "determiner",
        "3": "plural",
        "4": "cé na",
        "cat2": "interrogative determiners"
      },
      "expansion": "cén (plural cé na)",
      "name": "head"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "det",
  "senses": [
    {
      "categories": [
        "Irish determiners",
        "Irish entries with incorrect language header",
        "Irish interrogative determiners",
        "Irish lemmas",
        "Irish terms with usage examples",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              0,
              3
            ]
          ],
          "english": "What day of the week is it?",
          "text": "Cén lá den tseachtain é?",
          "type": "example"
        },
        {
          "bold_text_offsets": [
            [
              0,
              3
            ]
          ],
          "english": "Which woman is that?",
          "text": "Cén bhean í sin?",
          "type": "example"
        }
      ],
      "glosses": [
        "what, which"
      ],
      "links": [
        [
          "what",
          "what"
        ],
        [
          "which",
          "which"
        ]
      ],
      "raw_glosses": [
        "(interrogative) what, which"
      ],
      "tags": [
        "interrogative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ceːnˠ]"
    }
  ],
  "word": "cén"
}