"is mairg" meaning in Irish

{
  "etymology_text": "Contracted from is mairg don té (“sorrow is to the one”).",
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "phrase",
        "3": "past/conditional",
        "4": "ba mhairg"
      },
      "expansion": "is mairg (past/conditional ba mhairg)",
      "name": "head"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Irish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "Woe to those who find bad direction.",
          "text": "Is mairg a fhaigheann drocheolas.",
          "type": "example"
        },
        {
          "english": "Unlucky is he who is down at the first blow.",
          "text": "Is mairg a bheadh thíos den chéad bhuille.",
          "type": "example"
        },
        {
          "english": "Those who set their hearts on this world will come to grief.",
          "text": "Is mairg a chuireann suim sa tsaol.",
          "type": "example"
        }
      ],
      "glosses": [
        "woe to the one/to those; unlucky is the one/are those; come to grief (followed by a relative clause)"
      ],
      "id": "en-is_mairg-ga-phrase-XNj7TZj7",
      "links": [
        [
          "woe",
          "woe"
        ],
        [
          "unlucky",
          "unlucky"
        ],
        [
          "come to grief",
          "come to grief"
        ]
      ]
    }
  ],
  "word": "is mairg"
}

{
  "etymology_text": "Contracted from is mairg don té (“sorrow is to the one”).",
  "head_templates": [
    {
      "args": {
        "1": "ga",
        "2": "phrase",
        "3": "past/conditional",
        "4": "ba mhairg"
      },
      "expansion": "is mairg (past/conditional ba mhairg)",
      "name": "head"
    }
  ],
  "lang": "Irish",
  "lang_code": "ga",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "Irish entries with incorrect language header",
        "Irish lemmas",
        "Irish multiword terms",
        "Irish phrases",
        "Irish terms with usage examples"
      ],
      "examples": [
        {
          "english": "Woe to those who find bad direction.",
          "text": "Is mairg a fhaigheann drocheolas.",
          "type": "example"
        },
        {
          "english": "Unlucky is he who is down at the first blow.",
          "text": "Is mairg a bheadh thíos den chéad bhuille.",
          "type": "example"
        },
        {
          "english": "Those who set their hearts on this world will come to grief.",
          "text": "Is mairg a chuireann suim sa tsaol.",
          "type": "example"
        }
      ],
      "glosses": [
        "woe to the one/to those; unlucky is the one/are those; come to grief (followed by a relative clause)"
      ],
      "links": [
        [
          "woe",
          "woe"
        ],
        [
          "unlucky",
          "unlucky"
        ],
        [
          "come to grief",
          "come to grief"
        ]
      ]
    }
  ],
  "word": "is mairg"
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: past/conditional ba mhairg",
  "path": [
    "is mairg"
  ],
  "section": "Irish",
  "subsection": "phrase",
  "title": "is mairg",
  "trace": ""
}