"-erna" meaning in Latin

{
  "etymology_text": "Related to -urnus, rnus.",
  "forms": [
    {
      "form": "-ernus",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "-erna",
      "tags": [
        "feminine"
      ]
    },
    {
      "form": "-ernum",
      "tags": [
        "neuter"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-erna"
      },
      "expansion": "-ernus (feminine -erna, neuter -ernum); first/second-declension suffix",
      "name": "la-suffix-adj"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "alt": "cave, cavern, from cav-",
          "english": "hollow",
          "translation": "hollow",
          "word": "caverna"
        },
        {
          "alt": "cistern, reservoir, from cist-",
          "english": "box, chest",
          "translation": "box, chest",
          "word": "cisterna"
        },
        {
          "alt": "lamp, lantern, from luc-",
          "english": "light",
          "translation": "light",
          "word": "lucerna"
        },
        {
          "alt": "hut, shop, tavern, perhaps from tab- or trab-",
          "english": "board; beam",
          "translation": "board; beam",
          "word": "taberna"
        }
      ],
      "glosses": [
        "A noun-forming suffix, used to denote a place or container."
      ],
      "id": "en--erna-la-suffix-uQxiKM6O",
      "tags": [
        "declension-1",
        "declension-2",
        "morpheme",
        "suffix"
      ]
    }
  ],
  "word": "-erna"
}

{
  "derived": [
    {
      "alt": "cave, cavern, from cav-",
      "english": "hollow",
      "translation": "hollow",
      "word": "caverna"
    },
    {
      "alt": "cistern, reservoir, from cist-",
      "english": "box, chest",
      "translation": "box, chest",
      "word": "cisterna"
    },
    {
      "alt": "lamp, lantern, from luc-",
      "english": "light",
      "translation": "light",
      "word": "lucerna"
    },
    {
      "alt": "hut, shop, tavern, perhaps from tab- or trab-",
      "english": "board; beam",
      "translation": "board; beam",
      "word": "taberna"
    }
  ],
  "etymology_text": "Related to -urnus, rnus.",
  "forms": [
    {
      "form": "-ernus",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "-erna",
      "tags": [
        "feminine"
      ]
    },
    {
      "form": "-ernum",
      "tags": [
        "neuter"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-erna"
      },
      "expansion": "-ernus (feminine -erna, neuter -ernum); first/second-declension suffix",
      "name": "la-suffix-adj"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Latin adjective-forming suffixes",
        "Latin entries with incorrect language header",
        "Latin first and second declension suffixes",
        "Latin lemmas",
        "Latin suffixes",
        "Pages with 3 entries",
        "Pages with entries"
      ],
      "glosses": [
        "A noun-forming suffix, used to denote a place or container."
      ],
      "tags": [
        "declension-1",
        "declension-2",
        "morpheme",
        "suffix"
      ]
    }
  ],
  "word": "-erna"
}