"ex-" meaning in Latin

{
  "categories": [
    {
      "kind": "other",
      "name": "Dates manquantes en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Préfixes en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Latin",
      "orig": "latin",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "(Date à préciser) De ex."
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "prefix",
  "pos_title": "Préfixe",
  "related": [
    {
      "raw_tags": [
        "souvent devant une consonne"
      ],
      "word": "e-"
    },
    {
      "word": "ec-"
    },
    {
      "raw_tags": [
        "devant f"
      ],
      "word": "ef-"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Marque la sortie, la séparation, le point de départ."
      ],
      "id": "fr-ex--la-prefix-LxrpwTZa"
    },
    {
      "glosses": [
        "Marque la cause."
      ],
      "id": "fr-ex--la-prefix-Qa7P~Oye"
    },
    {
      "glosses": [
        "Marque la matière dont une chose est faite."
      ],
      "id": "fr-ex--la-prefix-9-aulTsy"
    },
    {
      "glosses": [
        "Marque une partie d’un tout qui est subdivisé."
      ],
      "id": "fr-ex--la-prefix-NWvs-YQO"
    },
    {
      "glosses": [
        "Au profit de."
      ],
      "id": "fr-ex--la-prefix-nVhHY-gF"
    }
  ],
  "tags": [
    "morpheme"
  ],
  "word": "ex-"
}

{
  "categories": [
    "Dates manquantes en latin",
    "Préfixes en latin",
    "latin"
  ],
  "etymology_texts": [
    "(Date à préciser) De ex."
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "prefix",
  "pos_title": "Préfixe",
  "related": [
    {
      "raw_tags": [
        "souvent devant une consonne"
      ],
      "word": "e-"
    },
    {
      "word": "ec-"
    },
    {
      "raw_tags": [
        "devant f"
      ],
      "word": "ef-"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Marque la sortie, la séparation, le point de départ."
      ]
    },
    {
      "glosses": [
        "Marque la cause."
      ]
    },
    {
      "glosses": [
        "Marque la matière dont une chose est faite."
      ]
    },
    {
      "glosses": [
        "Marque une partie d’un tout qui est subdivisé."
      ]
    },
    {
      "glosses": [
        "Au profit de."
      ]
    }
  ],
  "tags": [
    "morpheme"
  ],
  "word": "ex-"
}