"cathain" meaning in Irish

{
  "etymology_templates": [
    {
      "args": {
        "1": "ga",
        "2": "ghc",
        "3": "cá chuin"
      },
      "expansion": "Classical Gaelic cá chuin",
      "name": "der"
    },
    {
      "args": {
        "1": "ga",
        "2": "sga",
        "3": "cíachuin",
        "lit": "what when?"
      },
      "expansion": "Old Irish cíachuin (literally “what when?”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Classical Gaelic cá chuin, from Old Irish cíachuin (literally “what when?”), from cía + cuin.",
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "adverb",
        "cat2": "interrogative adverbs",
        "head": ""
      },
      "expansion": "cathain",
      "name": "head"
    },
    {
      "args": {
        "type": "interrogative"
      },
      "expansion": "cathain",
      "name": "ga-adv"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Irish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Munster Irish",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "When will you come home?",
          "text": "Cathain a thiocfaidh tú abhaile?",
          "type": "example"
        },
        {
          "english": "When is the bus coming?",
          "text": "Cathain atá an bus ag teacht?",
          "type": "example"
        },
        {
          "english": "When did they leave?",
          "text": "Cathain a d'fhág siad?",
          "type": "example"
        }
      ],
      "glosses": [
        "when (interrogative)"
      ],
      "id": "en-cathain-ga-adv-ldRKJ8~g",
      "links": [
        [
          "when",
          "when"
        ]
      ],
      "raw_glosses": [
        "(Munster) when (interrogative)"
      ],
      "synonyms": [
        {
          "tags": [
            "Ulster"
          ],
          "word": "cá huair"
        },
        {
          "tags": [
            "Connacht"
          ],
          "word": "cén uair"
        }
      ],
      "tags": [
        "Munster"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈkahənʲ/"
    }
  ],
  "word": "cathain"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "ga",
        "2": "ghc",
        "3": "cá chuin"
      },
      "expansion": "Classical Gaelic cá chuin",
      "name": "der"
    },
    {
      "args": {
        "1": "ga",
        "2": "sga",
        "3": "cíachuin",
        "lit": "what when?"
      },
      "expansion": "Old Irish cíachuin (literally “what when?”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Classical Gaelic cá chuin, from Old Irish cíachuin (literally “what when?”), from cía + cuin.",
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "adverb",
        "cat2": "interrogative adverbs",
        "head": ""
      },
      "expansion": "cathain",
      "name": "head"
    },
    {
      "args": {
        "type": "interrogative"
      },
      "expansion": "cathain",
      "name": "ga-adv"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Irish adverbs",
        "Irish entries with incorrect language header",
        "Irish interrogative adverbs",
        "Irish lemmas",
        "Irish terms derived from Classical Gaelic",
        "Irish terms derived from Old Irish",
        "Irish terms with usage examples",
        "Munster Irish",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "english": "When will you come home?",
          "text": "Cathain a thiocfaidh tú abhaile?",
          "type": "example"
        },
        {
          "english": "When is the bus coming?",
          "text": "Cathain atá an bus ag teacht?",
          "type": "example"
        },
        {
          "english": "When did they leave?",
          "text": "Cathain a d'fhág siad?",
          "type": "example"
        }
      ],
      "glosses": [
        "when (interrogative)"
      ],
      "links": [
        [
          "when",
          "when"
        ]
      ],
      "raw_glosses": [
        "(Munster) when (interrogative)"
      ],
      "synonyms": [
        {
          "tags": [
            "Ulster"
          ],
          "word": "cá huair"
        },
        {
          "tags": [
            "Connacht"
          ],
          "word": "cén uair"
        }
      ],
      "tags": [
        "Munster"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈkahənʲ/"
    }
  ],
  "word": "cathain"
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: followed by the direct relative",
  "path": [
    "cathain"
  ],
  "section": "Irish",
  "subsection": "adverb",
  "title": "cathain",
  "trace": ""
}