"a-" meaning in Danish

{
  "etymology_templates": [
    {
      "args": {
        "1": "da",
        "2": "grc",
        "3": "ἀ-",
        "4": "",
        "5": "not, without"
      },
      "expansion": "Ancient Greek ἀ- (a-, “not, without”)",
      "name": "der"
    },
    {
      "args": {
        "1": "da",
        "2": "grk-pro",
        "3": "*ə-",
        "4": "",
        "5": "un-, not; without, lacking"
      },
      "expansion": "Proto-Hellenic *ə- (“un-, not; without, lacking”)",
      "name": "der"
    },
    {
      "args": {
        "1": "da",
        "2": "ine-pro",
        "3": "*n̥-",
        "4": "",
        "5": "not, un-"
      },
      "expansion": "Proto-Indo-European *n̥- (“not, un-”)",
      "name": "der"
    },
    {
      "args": {
        "1": "da",
        "2": "u-"
      },
      "expansion": "Doublet of u-",
      "name": "doublet"
    }
  ],
  "etymology_text": "From Ancient Greek ἀ- (a-, “not, without”), from Proto-Hellenic *ə- (“un-, not; without, lacking”), from Proto-Indo-European *n̥- (“not, un-”). Doublet of u-.\nCompare an- (ἀν- (an-) immediately preceding a vowel).",
  "forms": [
    {
      "form": "an-",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "da",
        "2": "prefix",
        "head": ""
      },
      "expansion": "a-",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "a-",
      "name": "da-prefix"
    }
  ],
  "lang": "Danish",
  "lang_code": "da",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "_dis": "100 0",
          "kind": "other",
          "name": "Danish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "a-, un- (not)"
      ],
      "id": "en-a--da-prefix-8qb6gvRG",
      "links": [
        [
          "a-",
          "a-#English"
        ],
        [
          "un-",
          "un-"
        ],
        [
          "not",
          "not"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "glosses": [
        "A- (atomic, nuclear)"
      ],
      "id": "en-a--da-prefix-db9cMVHh",
      "links": [
        [
          "A-",
          "A-"
        ],
        [
          "atomic",
          "atomic"
        ],
        [
          "nuclear",
          "nuclear"
        ]
      ],
      "synonyms": [
        {
          "word": "atom-"
        },
        {
          "word": "A-"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "a-"
}

{
  "categories": [
    "Danish doublets",
    "Danish entries with incorrect language header",
    "Danish lemmas",
    "Danish prefixes",
    "Danish terms derived from Ancient Greek",
    "Danish terms derived from Proto-Hellenic",
    "Danish terms derived from Proto-Indo-European",
    "Pages using catfix",
    "Pages with 52 entries",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "da",
        "2": "grc",
        "3": "ἀ-",
        "4": "",
        "5": "not, without"
      },
      "expansion": "Ancient Greek ἀ- (a-, “not, without”)",
      "name": "der"
    },
    {
      "args": {
        "1": "da",
        "2": "grk-pro",
        "3": "*ə-",
        "4": "",
        "5": "un-, not; without, lacking"
      },
      "expansion": "Proto-Hellenic *ə- (“un-, not; without, lacking”)",
      "name": "der"
    },
    {
      "args": {
        "1": "da",
        "2": "ine-pro",
        "3": "*n̥-",
        "4": "",
        "5": "not, un-"
      },
      "expansion": "Proto-Indo-European *n̥- (“not, un-”)",
      "name": "der"
    },
    {
      "args": {
        "1": "da",
        "2": "u-"
      },
      "expansion": "Doublet of u-",
      "name": "doublet"
    }
  ],
  "etymology_text": "From Ancient Greek ἀ- (a-, “not, without”), from Proto-Hellenic *ə- (“un-, not; without, lacking”), from Proto-Indo-European *n̥- (“not, un-”). Doublet of u-.\nCompare an- (ἀν- (an-) immediately preceding a vowel).",
  "forms": [
    {
      "form": "an-",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "da",
        "2": "prefix",
        "head": ""
      },
      "expansion": "a-",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "a-",
      "name": "da-prefix"
    }
  ],
  "lang": "Danish",
  "lang_code": "da",
  "pos": "prefix",
  "senses": [
    {
      "glosses": [
        "a-, un- (not)"
      ],
      "links": [
        [
          "a-",
          "a-#English"
        ],
        [
          "un-",
          "un-"
        ],
        [
          "not",
          "not"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "glosses": [
        "A- (atomic, nuclear)"
      ],
      "links": [
        [
          "A-",
          "A-"
        ],
        [
          "atomic",
          "atomic"
        ],
        [
          "nuclear",
          "nuclear"
        ]
      ],
      "synonyms": [
        {
          "word": "atom-"
        },
        {
          "word": "A-"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "a-"
}