"is" meaning in Old Irish

{
  "descendants": [
    {
      "lang": "Irish",
      "lang_code": "ga",
      "word": "is"
    },
    {
      "lang": "Manx",
      "lang_code": "gv",
      "word": "s’"
    },
    {
      "lang": "Scottish Gaelic",
      "lang_code": "gd",
      "word": "is"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "sga",
        "2": "ine-pro",
        "3": "*h₁es-",
        "4": "*bʰuH-"
      },
      "expansion": "",
      "name": "root"
    },
    {
      "args": {
        "1": "sga",
        "2": "cel-pro",
        "3": "*esti"
      },
      "expansion": "Proto-Celtic *esti",
      "name": "inh"
    },
    {
      "args": {
        "1": "sga",
        "2": "ine-pro",
        "3": "*h₁ésti"
      },
      "expansion": "Proto-Indo-European *h₁ésti",
      "name": "inh"
    }
  ],
  "etymology_text": "The lemma is itself is from Proto-Celtic *esti, from Proto-Indo-European *h₁ésti; other forms are from either *h₁es- or *bʰuH-.",
  "forms": [
    {
      "form": "iss",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "10": "{{{prot2}}}",
        "11": "",
        "12": "{{{1}}}",
        "13": "",
        "14": "{{{2}}}",
        "2": "verb",
        "3": "",
        "4": "{{{conj}}}",
        "5": "",
        "6": "{{{conj2}}}",
        "7": "",
        "8": "{{{prot}}}",
        "9": "",
        "altform": "",
        "head": ""
      },
      "expansion": "is",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "is",
      "name": "sga-verb"
    }
  ],
  "hyphenations": [
    {
      "parts": [
        "is"
      ]
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old Irish entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 42 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "english": "although... is",
          "translation": "although... is",
          "word": "cesu"
        },
        {
          "english": "so that... is",
          "translation": "so that... is",
          "word": "condid"
        },
        {
          "english": "is... ?",
          "translation": "is... ?",
          "word": "in"
        },
        {
          "english": "if... is",
          "translation": "if... is",
          "word": "masu"
        },
        {
          "english": "is not",
          "translation": "is not",
          "word": "ní"
        }
      ],
      "examples": [
        {
          "text": "For quotations using this term, see Citations:is."
        }
      ],
      "glosses": [
        "to be"
      ],
      "id": "en-is-sga-verb-CvEgfuq9",
      "links": [
        [
          "be",
          "be"
        ]
      ],
      "related": [
        {
          "tags": [
            "substantive",
            "verb"
          ],
          "word": "at·tá"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈisʲ/"
    },
    {
      "rhymes": "-is"
    }
  ],
  "word": "is"
}

{
  "categories": [
    "Pages with 42 entries",
    "Pages with entries"
  ],
  "derived": [
    {
      "english": "although... is",
      "translation": "although... is",
      "word": "cesu"
    },
    {
      "english": "so that... is",
      "translation": "so that... is",
      "word": "condid"
    },
    {
      "english": "is... ?",
      "translation": "is... ?",
      "word": "in"
    },
    {
      "english": "if... is",
      "translation": "if... is",
      "word": "masu"
    },
    {
      "english": "is not",
      "translation": "is not",
      "word": "ní"
    }
  ],
  "descendants": [
    {
      "lang": "Irish",
      "lang_code": "ga",
      "word": "is"
    },
    {
      "lang": "Manx",
      "lang_code": "gv",
      "word": "s’"
    },
    {
      "lang": "Scottish Gaelic",
      "lang_code": "gd",
      "word": "is"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "sga",
        "2": "ine-pro",
        "3": "*h₁es-",
        "4": "*bʰuH-"
      },
      "expansion": "",
      "name": "root"
    },
    {
      "args": {
        "1": "sga",
        "2": "cel-pro",
        "3": "*esti"
      },
      "expansion": "Proto-Celtic *esti",
      "name": "inh"
    },
    {
      "args": {
        "1": "sga",
        "2": "ine-pro",
        "3": "*h₁ésti"
      },
      "expansion": "Proto-Indo-European *h₁ésti",
      "name": "inh"
    }
  ],
  "etymology_text": "The lemma is itself is from Proto-Celtic *esti, from Proto-Indo-European *h₁ésti; other forms are from either *h₁es- or *bʰuH-.",
  "forms": [
    {
      "form": "iss",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "10": "{{{prot2}}}",
        "11": "",
        "12": "{{{1}}}",
        "13": "",
        "14": "{{{2}}}",
        "2": "verb",
        "3": "",
        "4": "{{{conj}}}",
        "5": "",
        "6": "{{{conj2}}}",
        "7": "",
        "8": "{{{prot}}}",
        "9": "",
        "altform": "",
        "head": ""
      },
      "expansion": "is",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "is",
      "name": "sga-verb"
    }
  ],
  "hyphenations": [
    {
      "parts": [
        "is"
      ]
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "verb",
  "related": [
    {
      "tags": [
        "substantive",
        "verb"
      ],
      "word": "at·tá"
    }
  ],
  "senses": [
    {
      "categories": [
        "Old Irish entries with incorrect language header",
        "Old Irish lemmas",
        "Old Irish terms derived from Proto-Celtic",
        "Old Irish terms derived from Proto-Indo-European",
        "Old Irish terms derived from the Proto-Indo-European root *bʰuH-",
        "Old Irish terms derived from the Proto-Indo-European root *h₁es-",
        "Old Irish terms inherited from Proto-Celtic",
        "Old Irish terms inherited from Proto-Indo-European",
        "Old Irish terms with IPA pronunciation",
        "Old Irish verbs",
        "Pages with 42 entries",
        "Pages with entries",
        "Rhymes:Old Irish/is",
        "Rhymes:Old Irish/is/1 syllable"
      ],
      "examples": [
        {
          "text": "For quotations using this term, see Citations:is."
        }
      ],
      "glosses": [
        "to be"
      ],
      "links": [
        [
          "be",
          "be"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈisʲ/"
    },
    {
      "rhymes": "-is"
    }
  ],
  "word": "is"
}