"an-" meaning in Proto-Brythonic

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "br",
            "2": "an-"
          },
          "expansion": "Breton: an-",
          "name": "desc"
        }
      ],
      "text": "Breton: an-"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "kw",
            "2": "an-"
          },
          "expansion": "Cornish: an-",
          "name": "desc"
        }
      ],
      "text": "Cornish: an-"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "wlm",
            "2": "an-"
          },
          "expansion": "Middle Welsh: an-\nWelsh: an-, af-",
          "name": "desctree"
        }
      ],
      "text": "Middle Welsh: an-\nWelsh: an-, af-"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "cel-bry-pro",
        "2": "cel-pro",
        "3": "*an-"
      },
      "expansion": "Proto-Celtic *an-",
      "name": "inh"
    },
    {
      "args": {
        "1": "cel-bry-pro",
        "2": "ine-pro",
        "3": "*n̥-"
      },
      "expansion": "Proto-Indo-European *n̥-",
      "name": "inh"
    }
  ],
  "etymology_text": "From earlier an- (found in andagin (“worthless”, accusative singular feminine) of the Bath curse tablets), from Proto-Celtic *an-, from Proto-Indo-European *n̥-.",
  "head_templates": [
    {
      "args": {
        "1": "cel-bry-pro",
        "2": "prefix"
      },
      "expansion": "*an-",
      "name": "head"
    }
  ],
  "lang": "Proto-Brythonic",
  "lang_code": "cel-bry-pro",
  "original_title": "Reconstruction:Proto-Brythonic/an-",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Entries with collapsible category trees for nonexistent categories",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Proto-Brythonic entries with incorrect language header",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "un-, not"
      ],
      "id": "en-an--cel-bry-pro-prefix-91bXtNmE",
      "links": [
        [
          "un-",
          "un-"
        ],
        [
          "not",
          "not"
        ]
      ],
      "tags": [
        "morpheme",
        "reconstruction"
      ]
    }
  ],
  "word": "an-"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "br",
            "2": "an-"
          },
          "expansion": "Breton: an-",
          "name": "desc"
        }
      ],
      "text": "Breton: an-"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "kw",
            "2": "an-"
          },
          "expansion": "Cornish: an-",
          "name": "desc"
        }
      ],
      "text": "Cornish: an-"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "wlm",
            "2": "an-"
          },
          "expansion": "Middle Welsh: an-\nWelsh: an-, af-",
          "name": "desctree"
        }
      ],
      "text": "Middle Welsh: an-\nWelsh: an-, af-"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "cel-bry-pro",
        "2": "cel-pro",
        "3": "*an-"
      },
      "expansion": "Proto-Celtic *an-",
      "name": "inh"
    },
    {
      "args": {
        "1": "cel-bry-pro",
        "2": "ine-pro",
        "3": "*n̥-"
      },
      "expansion": "Proto-Indo-European *n̥-",
      "name": "inh"
    }
  ],
  "etymology_text": "From earlier an- (found in andagin (“worthless”, accusative singular feminine) of the Bath curse tablets), from Proto-Celtic *an-, from Proto-Indo-European *n̥-.",
  "head_templates": [
    {
      "args": {
        "1": "cel-bry-pro",
        "2": "prefix"
      },
      "expansion": "*an-",
      "name": "head"
    }
  ],
  "lang": "Proto-Brythonic",
  "lang_code": "cel-bry-pro",
  "original_title": "Reconstruction:Proto-Brythonic/an-",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Entries with collapsible category trees for nonexistent categories",
        "Pages using catfix",
        "Pages with 1 entry",
        "Pages with entries",
        "Proto-Brythonic entries with incorrect language header",
        "Proto-Brythonic lemmas",
        "Proto-Brythonic prefixes",
        "Proto-Brythonic terms derived from Proto-Celtic",
        "Proto-Brythonic terms derived from Proto-Indo-European",
        "Proto-Brythonic terms inherited from Proto-Celtic",
        "Proto-Brythonic terms inherited from Proto-Indo-European"
      ],
      "glosses": [
        "un-, not"
      ],
      "links": [
        [
          "un-",
          "un-"
        ],
        [
          "not",
          "not"
        ]
      ],
      "tags": [
        "morpheme",
        "reconstruction"
      ]
    }
  ],
  "word": "an-"
}