"-a" meaning in Old Irish

{
  "etymology_number": 1,
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      "args": {
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        "2": "relative"
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      "expansion": "",
      "name": "etymid"
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    {
      "args": {
        "1": "sga",
        "2": "cel-pro",
        "3": "*yo"
      },
      "expansion": "Proto-Celtic *yo",
      "name": "der"
    },
    {
      "args": {
        "1": "sga",
        "2": "ine-pro",
        "3": "*Hyós"
      },
      "expansion": "Proto-Indo-European *Hyós",
      "name": "der"
    }
  ],
  "etymology_text": "From Proto-Celtic *yo, from Proto-Indo-European *Hyós.",
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "2": "relative pronoun"
      },
      "expansion": "-a",
      "name": "head"
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "pron",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old Irish relative pronouns",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "ar (“for the sake of”) + -a → ara (“for the sake of whom/which”)",
          "type": "example"
        }
      ],
      "glosses": [
        "combines with prepositions to form a relative pronoun"
      ],
      "id": "en--a-sga-pron-icBR0sMJ"
    }
  ],
  "sounds": [
    {
      "ipa": "/-a/"
    }
  ],
  "word": "-a"
}

{
  "etymology_number": 2,
  "etymology_templates": [
    {
      "args": {
        "1": "sga",
        "2": "comparative"
      },
      "expansion": "",
      "name": "etymid"
    },
    {
      "args": {
        "1": "cel-pro",
        "2": "*-is"
      },
      "expansion": "Proto-Celtic *-is",
      "name": "m+"
    },
    {
      "args": {
        "1": "rebracketing"
      },
      "expansion": "rebracketing",
      "name": "glossary"
    },
    {
      "args": {
        "1": "cel-pro",
        "2": "*māros",
        "3": "*mais",
        "t": "more"
      },
      "expansion": "Proto-Celtic *mais (“more”)",
      "name": "m+"
    },
    {
      "args": {
        "1": "sga",
        "2": "mó"
      },
      "expansion": "Old Irish mó",
      "name": "m+"
    }
  ],
  "etymology_text": "An allomorph of -iu. It derives from Proto-Celtic *-is, the neuter of *-yūs. -is was extended to -ais thanks to a rebracketing of Proto-Celtic *mais (“more”) from *ma-is to *m-ais (neuter of *māyūs from which Old Irish mó).",
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "2": "suffix",
        "cat2": "inflectional suffixes"
      },
      "expansion": "-a",
      "name": "head"
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "_dis": "7 93",
          "kind": "other",
          "name": "Old Irish entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "lethan (“broad”) + -a → letha (“broader”)",
          "type": "example"
        }
      ],
      "glosses": [
        "forms the comparative degree of some adjectives"
      ],
      "id": "en--a-sga-suffix-9tEMHOoE",
      "synonyms": [
        {
          "word": "-iu"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/-a/"
    }
  ],
  "word": "-a"
}

{
  "categories": [
    "Old Irish entries with incorrect language header",
    "Old Irish inflectional suffixes",
    "Old Irish lemmas",
    "Old Irish relative pronouns",
    "Old Irish suffixes",
    "Old Irish terms derived from Proto-Celtic",
    "Old Irish terms derived from Proto-Indo-European",
    "Old Irish terms with IPA pronunciation",
    "Pages using catfix",
    "Pages with 63 entries",
    "Pages with entries"
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  "etymology_number": 1,
  "etymology_templates": [
    {
      "args": {
        "1": "sga",
        "2": "relative"
      },
      "expansion": "",
      "name": "etymid"
    },
    {
      "args": {
        "1": "sga",
        "2": "cel-pro",
        "3": "*yo"
      },
      "expansion": "Proto-Celtic *yo",
      "name": "der"
    },
    {
      "args": {
        "1": "sga",
        "2": "ine-pro",
        "3": "*Hyós"
      },
      "expansion": "Proto-Indo-European *Hyós",
      "name": "der"
    }
  ],
  "etymology_text": "From Proto-Celtic *yo, from Proto-Indo-European *Hyós.",
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "2": "relative pronoun"
      },
      "expansion": "-a",
      "name": "head"
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "pron",
  "senses": [
    {
      "examples": [
        {
          "text": "ar (“for the sake of”) + -a → ara (“for the sake of whom/which”)",
          "type": "example"
        }
      ],
      "glosses": [
        "combines with prepositions to form a relative pronoun"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/-a/"
    }
  ],
  "word": "-a"
}

{
  "categories": [
    "Old Irish entries with incorrect language header",
    "Old Irish inflectional suffixes",
    "Old Irish lemmas",
    "Old Irish suffixes",
    "Old Irish terms with IPA pronunciation",
    "Pages using catfix",
    "Pages with 63 entries",
    "Pages with entries"
  ],
  "etymology_number": 2,
  "etymology_templates": [
    {
      "args": {
        "1": "sga",
        "2": "comparative"
      },
      "expansion": "",
      "name": "etymid"
    },
    {
      "args": {
        "1": "cel-pro",
        "2": "*-is"
      },
      "expansion": "Proto-Celtic *-is",
      "name": "m+"
    },
    {
      "args": {
        "1": "rebracketing"
      },
      "expansion": "rebracketing",
      "name": "glossary"
    },
    {
      "args": {
        "1": "cel-pro",
        "2": "*māros",
        "3": "*mais",
        "t": "more"
      },
      "expansion": "Proto-Celtic *mais (“more”)",
      "name": "m+"
    },
    {
      "args": {
        "1": "sga",
        "2": "mó"
      },
      "expansion": "Old Irish mó",
      "name": "m+"
    }
  ],
  "etymology_text": "An allomorph of -iu. It derives from Proto-Celtic *-is, the neuter of *-yūs. -is was extended to -ais thanks to a rebracketing of Proto-Celtic *mais (“more”) from *ma-is to *m-ais (neuter of *māyūs from which Old Irish mó).",
  "head_templates": [
    {
      "args": {
        "1": "sga",
        "2": "suffix",
        "cat2": "inflectional suffixes"
      },
      "expansion": "-a",
      "name": "head"
    }
  ],
  "lang": "Old Irish",
  "lang_code": "sga",
  "pos": "suffix",
  "senses": [
    {
      "examples": [
        {
          "text": "lethan (“broad”) + -a → letha (“broader”)",
          "type": "example"
        }
      ],
      "glosses": [
        "forms the comparative degree of some adjectives"
      ],
      "synonyms": [
        {
          "word": "-iu"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/-a/"
    }
  ],
  "word": "-a"
}