"ad-" meaning in Latin

{
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": ":inh",
        "3": "itc-pro:*ad-<id:to>",
        "id": "to"
      },
      "expansion": "",
      "name": "etymon"
    },
    {
      "args": {
        "1": "la",
        "2": "ine-pro"
      },
      "expansion": "",
      "name": "dercat"
    },
    {
      "args": {
        "1": "ine-pro"
      },
      "expansion": "Proto-Indo-European",
      "name": "langname"
    },
    {
      "args": {
        "1": "la",
        "2": "ine",
        "3": "h₂éd"
      },
      "expansion": "",
      "name": "word"
    },
    {
      "args": {
        "1": "la",
        "2": "itc-pro",
        "3": "*ad-"
      },
      "expansion": "Proto-Italic *ad-",
      "name": "inh"
    }
  ],
  "etymology_text": "Prefixed form of the preposition ad (“to, towards”). This prefix also appears in other Italic languages, entailing the reconstruction of Proto-Italic *ad- as a prefix.",
  "forms": [
    {
      "form": "ap-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "at-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "ac-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "al-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "ar-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "ag-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "as-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "af-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "am-",
      "tags": [
        "alternative",
        "uncommon"
      ]
    },
    {
      "form": "an-",
      "tags": [
        "alternative",
        "uncommon"
      ]
    },
    {
      "form": "ab-",
      "tags": [
        "alternative",
        "rare"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "prefix"
      },
      "expansion": "ad-",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "prefix",
  "senses": [
    {
      "glosses": [
        "to"
      ],
      "id": "en-ad--la-prefix-Zj6hv~~l",
      "links": [
        [
          "to",
          "to"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "categories": [
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "usually prefixed to verbs, in which cases it often has the effect of intensifying the verbal action"
      ],
      "id": "en-ad--la-prefix-qe0jZWdg",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "ad-"
}

{
  "categories": [
    "Latin entries with incorrect language header",
    "Latin lemmas",
    "Latin prefixes",
    "Latin terms derived from Proto-Indo-European",
    "Latin terms derived from Proto-Italic",
    "Latin terms derived from the Proto-Indo-European word *h₂éd",
    "Latin terms inherited from Proto-Italic",
    "Pages using catfix",
    "Pages with 10 entries",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": ":inh",
        "3": "itc-pro:*ad-<id:to>",
        "id": "to"
      },
      "expansion": "",
      "name": "etymon"
    },
    {
      "args": {
        "1": "la",
        "2": "ine-pro"
      },
      "expansion": "",
      "name": "dercat"
    },
    {
      "args": {
        "1": "ine-pro"
      },
      "expansion": "Proto-Indo-European",
      "name": "langname"
    },
    {
      "args": {
        "1": "la",
        "2": "ine",
        "3": "h₂éd"
      },
      "expansion": "",
      "name": "word"
    },
    {
      "args": {
        "1": "la",
        "2": "itc-pro",
        "3": "*ad-"
      },
      "expansion": "Proto-Italic *ad-",
      "name": "inh"
    }
  ],
  "etymology_text": "Prefixed form of the preposition ad (“to, towards”). This prefix also appears in other Italic languages, entailing the reconstruction of Proto-Italic *ad- as a prefix.",
  "forms": [
    {
      "form": "ap-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "at-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "ac-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "al-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "ar-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "ag-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "as-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "af-",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "am-",
      "tags": [
        "alternative",
        "uncommon"
      ]
    },
    {
      "form": "an-",
      "tags": [
        "alternative",
        "uncommon"
      ]
    },
    {
      "form": "ab-",
      "tags": [
        "alternative",
        "rare"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "prefix"
      },
      "expansion": "ad-",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "prefix",
  "senses": [
    {
      "glosses": [
        "to"
      ],
      "links": [
        [
          "to",
          "to"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "glosses": [
        "usually prefixed to verbs, in which cases it often has the effect of intensifying the verbal action"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "ad-"
}