"arþ" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {
        "1": "ang",
        "2": "verb form",
        "head": "arþ"
      },
      "expansion": "arþ",
      "name": "head"
    }
  ],
  "lang": "Old English",
  "lang_code": "ang",
  "pos": "verb",
  "senses": [
    {
      "alt_of": [
        {
          "word": "eart"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Anglian Old English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Northumbrian Old English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Old English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of eart"
      ],
      "id": "en-arþ-ang-verb-KKjqhbLj",
      "links": [
        [
          "eart",
          "eart#Old English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɑrθ/"
    },
    {
      "ipa": "[ɑrˠθ]"
    }
  ],
  "word": "arþ"
}

{
  "head_templates": [
    {
      "args": {
        "1": "ang",
        "2": "verb form",
        "head": "arþ"
      },
      "expansion": "arþ",
      "name": "head"
    }
  ],
  "lang": "Old English",
  "lang_code": "ang",
  "pos": "verb",
  "senses": [
    {
      "alt_of": [
        {
          "word": "eart"
        }
      ],
      "categories": [
        "Anglian Old English",
        "Northumbrian Old English",
        "Old English entries with incorrect language header",
        "Old English non-lemma forms",
        "Old English terms with IPA pronunciation",
        "Old English terms with redundant head parameter",
        "Old English verb forms"
      ],
      "glosses": [
        "Alternative form of eart"
      ],
      "links": [
        [
          "eart",
          "eart#Old English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɑrθ/"
    },
    {
      "ipa": "[ɑrˠθ]"
    }
  ],
  "word": "arþ"
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: Northumbrian",
  "path": [
    "arþ"
  ],
  "section": "Old English",
  "subsection": "verb",
  "title": "arþ",
  "trace": ""
}