"koy-" meaning in Tocharian A

{
  "etymology_templates": [
    {
      "args": {
        "1": "xto",
        "2": "ine-toc-pro",
        "3": "*koy"
      },
      "expansion": "Proto-Tocharian *koy",
      "name": "inh"
    },
    {
      "args": {
        "1": "txb",
        "2": "koyn",
        "3": "",
        "4": "mouth"
      },
      "expansion": "Tocharian B koyn (“mouth”)",
      "name": "cog"
    },
    {
      "args": {
        "1": "xto",
        "2": "ine-pro",
        "3": "",
        "4": "*ǵʰh₂óyu",
        "5": "gape",
        "pos": "noun"
      },
      "expansion": "Proto-Indo-European *ǵʰh₂óyu (“gape”, noun)",
      "name": "inh"
    },
    {
      "args": {
        "1": "la",
        "2": "hiō",
        "3": "",
        "4": "I stand open; I gape, yawn"
      },
      "expansion": "Latin hiō (“I stand open; I gape, yawn”)",
      "name": "cog"
    },
    {
      "args": {
        "1": "lt",
        "2": "žióti",
        "3": "žióju",
        "4": "I open"
      },
      "expansion": "Lithuanian žióju (“I open”)",
      "name": "cog"
    },
    {
      "args": {
        "1": "sla-pro",
        "2": "*zijati",
        "3": "",
        "4": "to be open; to gape"
      },
      "expansion": "Proto-Slavic *zijati (“to be open; to gape”)",
      "name": "cog"
    },
    {
      "args": {
        "1": "ang",
        "2": "ġinian",
        "3": "",
        "4": "to gape, yawn"
      },
      "expansion": "Old English ġinian (“to gape, yawn”)",
      "name": "cog"
    }
  ],
  "etymology_text": "From Proto-Tocharian *koy (whence also Tocharian B koyn (“mouth”)), from Proto-Indo-European *ǵʰh₂óyu (“gape”, noun), from the root *ǵʰh₂ey-, extended from the original root *ǵʰeh₂- (“to open wide, gape, yawn”). Compare Latin hiō (“I stand open; I gape, yawn”), Lithuanian žióju (“I open”), Proto-Slavic *zijati (“to be open; to gape”), Old English ġinian (“to gape, yawn”).",
  "head_templates": [
    {
      "args": {
        "1": "xto",
        "2": "noun"
      },
      "expansion": "koy-",
      "name": "head"
    }
  ],
  "lang": "Tocharian A",
  "lang_code": "xto",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Tocharian A entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "xto",
          "name": "Anatomy",
          "orig": "xto:Anatomy",
          "parents": [
            "Biology",
            "Medicine",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "mouth"
      ],
      "id": "en-koy--xto-noun-TPNc-HQ1",
      "links": [
        [
          "anatomy",
          "anatomy"
        ],
        [
          "mouth",
          "mouth"
        ]
      ],
      "raw_glosses": [
        "(anatomy) mouth"
      ],
      "topics": [
        "anatomy",
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "koy-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "xto",
        "2": "ine-toc-pro",
        "3": "*koy"
      },
      "expansion": "Proto-Tocharian *koy",
      "name": "inh"
    },
    {
      "args": {
        "1": "txb",
        "2": "koyn",
        "3": "",
        "4": "mouth"
      },
      "expansion": "Tocharian B koyn (“mouth”)",
      "name": "cog"
    },
    {
      "args": {
        "1": "xto",
        "2": "ine-pro",
        "3": "",
        "4": "*ǵʰh₂óyu",
        "5": "gape",
        "pos": "noun"
      },
      "expansion": "Proto-Indo-European *ǵʰh₂óyu (“gape”, noun)",
      "name": "inh"
    },
    {
      "args": {
        "1": "la",
        "2": "hiō",
        "3": "",
        "4": "I stand open; I gape, yawn"
      },
      "expansion": "Latin hiō (“I stand open; I gape, yawn”)",
      "name": "cog"
    },
    {
      "args": {
        "1": "lt",
        "2": "žióti",
        "3": "žióju",
        "4": "I open"
      },
      "expansion": "Lithuanian žióju (“I open”)",
      "name": "cog"
    },
    {
      "args": {
        "1": "sla-pro",
        "2": "*zijati",
        "3": "",
        "4": "to be open; to gape"
      },
      "expansion": "Proto-Slavic *zijati (“to be open; to gape”)",
      "name": "cog"
    },
    {
      "args": {
        "1": "ang",
        "2": "ġinian",
        "3": "",
        "4": "to gape, yawn"
      },
      "expansion": "Old English ġinian (“to gape, yawn”)",
      "name": "cog"
    }
  ],
  "etymology_text": "From Proto-Tocharian *koy (whence also Tocharian B koyn (“mouth”)), from Proto-Indo-European *ǵʰh₂óyu (“gape”, noun), from the root *ǵʰh₂ey-, extended from the original root *ǵʰeh₂- (“to open wide, gape, yawn”). Compare Latin hiō (“I stand open; I gape, yawn”), Lithuanian žióju (“I open”), Proto-Slavic *zijati (“to be open; to gape”), Old English ġinian (“to gape, yawn”).",
  "head_templates": [
    {
      "args": {
        "1": "xto",
        "2": "noun"
      },
      "expansion": "koy-",
      "name": "head"
    }
  ],
  "lang": "Tocharian A",
  "lang_code": "xto",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Tocharian A entries with incorrect language header",
        "Tocharian A lemmas",
        "Tocharian A nouns",
        "Tocharian A terms derived from Proto-Indo-European",
        "Tocharian A terms derived from Proto-Tocharian",
        "Tocharian A terms inherited from Proto-Indo-European",
        "Tocharian A terms inherited from Proto-Tocharian",
        "xto:Anatomy"
      ],
      "glosses": [
        "mouth"
      ],
      "links": [
        [
          "anatomy",
          "anatomy"
        ],
        [
          "mouth",
          "mouth"
        ]
      ],
      "raw_glosses": [
        "(anatomy) mouth"
      ],
      "topics": [
        "anatomy",
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "koy-"
}