"a-" meaning in Catalan

{
  "etymology_number": 1,
  "etymology_templates": [
    {
      "args": {
        "1": "ca",
        "2": "grc",
        "3": "ἀ-"
      },
      "expansion": "Borrowed from Ancient Greek ἀ- (a-)",
      "name": "bor+"
    }
  ],
  "etymology_text": "Borrowed from Ancient Greek ἀ- (a-).",
  "head_templates": [
    {
      "args": {
        "1": "ca",
        "2": "prefix"
      },
      "expansion": "a-",
      "name": "head"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "prefix",
  "senses": [
    {
      "examples": [
        {
          "text": "a- + moral (“moral”) → amoral (“amoral”)",
          "type": "example"
        }
      ],
      "glosses": [
        "a- (not, without)"
      ],
      "id": "en-a--ca-prefix-gmGeyk0n",
      "links": [
        [
          "a-",
          "a-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "a-"
}

{
  "etymology_number": 2,
  "etymology_templates": [
    {
      "args": {
        "1": "ca",
        "2": "la",
        "3": "ad",
        "t": "towards"
      },
      "expansion": "Latin ad (“towards”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Latin ad (“towards”).",
  "head_templates": [
    {
      "args": {
        "1": "ca",
        "2": "prefix"
      },
      "expansion": "a-",
      "name": "head"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "_dis": "12 88",
          "kind": "other",
          "name": "Catalan entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "a- + feble (“weak”) → afeblir (“to weaken”)",
          "type": "example"
        },
        {
          "text": "a- + sabor (“taste”) → assaborir (“to taste”)",
          "type": "example"
        }
      ],
      "glosses": [
        "used to make verbs from adjectives and nouns"
      ],
      "id": "en-a--ca-prefix-WwopwIv4",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "a-"
}

{
  "categories": [
    "Catalan entries with incorrect language header",
    "Catalan lemmas",
    "Catalan prefixes",
    "Catalan terms borrowed from Ancient Greek",
    "Catalan terms derived from Ancient Greek",
    "Catalan terms derived from Latin",
    "Pages using catfix",
    "Pages with 50 entries",
    "Pages with entries"
  ],
  "etymology_number": 1,
  "etymology_templates": [
    {
      "args": {
        "1": "ca",
        "2": "grc",
        "3": "ἀ-"
      },
      "expansion": "Borrowed from Ancient Greek ἀ- (a-)",
      "name": "bor+"
    }
  ],
  "etymology_text": "Borrowed from Ancient Greek ἀ- (a-).",
  "head_templates": [
    {
      "args": {
        "1": "ca",
        "2": "prefix"
      },
      "expansion": "a-",
      "name": "head"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "prefix",
  "senses": [
    {
      "examples": [
        {
          "text": "a- + moral (“moral”) → amoral (“amoral”)",
          "type": "example"
        }
      ],
      "glosses": [
        "a- (not, without)"
      ],
      "links": [
        [
          "a-",
          "a-#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "a-"
}

{
  "categories": [
    "Catalan entries with incorrect language header",
    "Catalan lemmas",
    "Catalan prefixes",
    "Catalan terms derived from Latin",
    "Pages using catfix",
    "Pages with 50 entries",
    "Pages with entries"
  ],
  "etymology_number": 2,
  "etymology_templates": [
    {
      "args": {
        "1": "ca",
        "2": "la",
        "3": "ad",
        "t": "towards"
      },
      "expansion": "Latin ad (“towards”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Latin ad (“towards”).",
  "head_templates": [
    {
      "args": {
        "1": "ca",
        "2": "prefix"
      },
      "expansion": "a-",
      "name": "head"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "prefix",
  "senses": [
    {
      "examples": [
        {
          "text": "a- + feble (“weak”) → afeblir (“to weaken”)",
          "type": "example"
        },
        {
          "text": "a- + sabor (“taste”) → assaborir (“to taste”)",
          "type": "example"
        }
      ],
      "glosses": [
        "used to make verbs from adjectives and nouns"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "a-"
}