"frustra" meaning in Latin

{
  "derived": [
    {
      "_dis1": "0 0",
      "word": "frūstror"
    },
    {
      "_dis1": "0 0",
      "word": "frūstrō"
    }
  ],
  "etymology_text": "Adverb from *frusterus, for *frudterus/ *fruditerus, from fraus (“harm, injury”).",
  "forms": [
    {
      "form": "frūstrā",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "frūstrā",
        "2": "-"
      },
      "expansion": "frūstrā (not comparable)",
      "name": "la-adv"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "adv",
  "related": [
    {
      "_dis1": "0 0",
      "word": "in cassum"
    },
    {
      "_dis1": "0 0",
      "word": "fūtile"
    }
  ],
  "senses": [
    {
      "glosses": [
        "in deception, in error"
      ],
      "id": "en-frustra-la-adv-T14vjH-r",
      "links": [
        [
          "deception",
          "deception"
        ],
        [
          "error",
          "error"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    },
    {
      "categories": [
        {
          "_dis": "11 2 13 11 2 1 11 2 0 14 11 2 12 11 2",
          "kind": "other",
          "name": "Pages with 8 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "12 1 9 12 1 0 12 1 0 16 12 1 9 12 1",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "3 97",
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "without effect, to no purpose, without cause, uselessly, in vain, for nothing"
      ],
      "id": "en-frustra-la-adv--hMYgR8d",
      "links": [
        [
          "effect",
          "effect"
        ],
        [
          "purpose",
          "purpose"
        ],
        [
          "cause",
          "cause"
        ],
        [
          "uselessly",
          "uselessly"
        ],
        [
          "in vain",
          "in vain"
        ],
        [
          "for nothing",
          "for nothing"
        ]
      ],
      "synonyms": [
        {
          "word": "nēquīquam"
        },
        {
          "word": "īnfēlīciter"
        },
        {
          "word": "supervacuō"
        },
        {
          "word": "incassum"
        },
        {
          "word": "in cassum"
        }
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈfruːs.traː/",
      "tags": [
        "Classical-Latin"
      ]
    },
    {
      "ipa": "[ˈfruːs̠t̪räː]",
      "tags": [
        "Classical-Latin"
      ]
    },
    {
      "ipa": "/ˈfrus.tra/",
      "note": "modern Italianate Ecclesiastical"
    },
    {
      "ipa": "[ˈfrust̪rä]",
      "note": "modern Italianate Ecclesiastical"
    }
  ],
  "word": "frustra"
}

{
  "categories": [
    "Latin 2-syllable words",
    "Latin adverbs",
    "Latin entries with incorrect language header",
    "Latin lemmas",
    "Latin terms with IPA pronunciation",
    "Latin uncomparable adverbs",
    "Pages with 8 entries",
    "Pages with entries"
  ],
  "derived": [
    {
      "word": "frūstror"
    },
    {
      "word": "frūstrō"
    }
  ],
  "etymology_text": "Adverb from *frusterus, for *frudterus/ *fruditerus, from fraus (“harm, injury”).",
  "forms": [
    {
      "form": "frūstrā",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "frūstrā",
        "2": "-"
      },
      "expansion": "frūstrā (not comparable)",
      "name": "la-adv"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "adv",
  "related": [
    {
      "word": "in cassum"
    },
    {
      "word": "fūtile"
    }
  ],
  "senses": [
    {
      "glosses": [
        "in deception, in error"
      ],
      "links": [
        [
          "deception",
          "deception"
        ],
        [
          "error",
          "error"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    },
    {
      "glosses": [
        "without effect, to no purpose, without cause, uselessly, in vain, for nothing"
      ],
      "links": [
        [
          "effect",
          "effect"
        ],
        [
          "purpose",
          "purpose"
        ],
        [
          "cause",
          "cause"
        ],
        [
          "uselessly",
          "uselessly"
        ],
        [
          "in vain",
          "in vain"
        ],
        [
          "for nothing",
          "for nothing"
        ]
      ],
      "synonyms": [
        {
          "word": "nēquīquam"
        },
        {
          "word": "īnfēlīciter"
        },
        {
          "word": "supervacuō"
        },
        {
          "word": "incassum"
        },
        {
          "word": "in cassum"
        }
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈfruːs.traː/",
      "tags": [
        "Classical-Latin"
      ]
    },
    {
      "ipa": "[ˈfruːs̠t̪räː]",
      "tags": [
        "Classical-Latin"
      ]
    },
    {
      "ipa": "/ˈfrus.tra/",
      "note": "modern Italianate Ecclesiastical"
    },
    {
      "ipa": "[ˈfrust̪rä]",
      "note": "modern Italianate Ecclesiastical"
    }
  ],
  "word": "frustra"
}