"deterrer" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": ":af",
        "3": "deter<id:scare away>",
        "4": "-er<id:agent suffix>",
        "id": "one who deters",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *de\nProto-Italic *dē\nLatin dē\nLatin dē-\nProto-Indo-European *tres-\nProto-Indo-European *-yeti\nProto-Indo-European *-éyeti\nProto-Indo-European *troséyeti\nProto-Italic *trozeō\nLatin terreō\nLatin dēterreōbor.\nEnglish deter\nLatin -ariusbor.\nProto-Germanic *-ārijaz\nProto-West Germanic *-ārī\nOld English -ere\nMiddle English -ere\nEnglish -er\nEnglish deterrer",
      "name": "etymon"
    },
    {
      "args": {
        "1": "en",
        "2": "deter",
        "3": "er",
        "id2": "agent noun"
      },
      "expansion": "deter + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "Etymology tree\nProto-Indo-European *de\nProto-Italic *dē\nLatin dē\nLatin dē-\nProto-Indo-European *tres-\nProto-Indo-European *-yeti\nProto-Indo-European *-éyeti\nProto-Indo-European *troséyeti\nProto-Italic *trozeō\nLatin terreō\nLatin dēterreōbor.\nEnglish deter\nLatin -ariusbor.\nProto-Germanic *-ārijaz\nProto-West Germanic *-ārī\nOld English -ere\nMiddle English -ere\nEnglish -er\nEnglish deterrer\nFrom deter + -er.",
  "forms": [
    {
      "form": "deterrers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "deterrer (plural deterrers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with etymology trees",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -er (agent noun)",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -er (agent suffix)",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with etymology trees",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "One who, or that which, deters."
      ],
      "id": "en-deterrer-en-noun-pX70fi6H",
      "links": [
        [
          "deter",
          "deter"
        ]
      ],
      "synonyms": [
        {
          "word": "deterrent"
        }
      ]
    }
  ],
  "word": "deterrer"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": ":af",
        "3": "deter<id:scare away>",
        "4": "-er<id:agent suffix>",
        "id": "one who deters",
        "tree": "1"
      },
      "expansion": "Etymology tree\nProto-Indo-European *de\nProto-Italic *dē\nLatin dē\nLatin dē-\nProto-Indo-European *tres-\nProto-Indo-European *-yeti\nProto-Indo-European *-éyeti\nProto-Indo-European *troséyeti\nProto-Italic *trozeō\nLatin terreō\nLatin dēterreōbor.\nEnglish deter\nLatin -ariusbor.\nProto-Germanic *-ārijaz\nProto-West Germanic *-ārī\nOld English -ere\nMiddle English -ere\nEnglish -er\nEnglish deterrer",
      "name": "etymon"
    },
    {
      "args": {
        "1": "en",
        "2": "deter",
        "3": "er",
        "id2": "agent noun"
      },
      "expansion": "deter + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "Etymology tree\nProto-Indo-European *de\nProto-Italic *dē\nLatin dē\nLatin dē-\nProto-Indo-European *tres-\nProto-Indo-European *-yeti\nProto-Indo-European *-éyeti\nProto-Indo-European *troséyeti\nProto-Italic *trozeō\nLatin terreō\nLatin dēterreōbor.\nEnglish deter\nLatin -ariusbor.\nProto-Germanic *-ārijaz\nProto-West Germanic *-ārī\nOld English -ere\nMiddle English -ere\nEnglish -er\nEnglish deterrer\nFrom deter + -er.",
  "forms": [
    {
      "form": "deterrers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "deterrer (plural deterrers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with etymology trees",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms derived from Latin",
        "English terms derived from Middle English",
        "English terms derived from Old English",
        "English terms derived from Proto-Germanic",
        "English terms derived from Proto-Indo-European",
        "English terms derived from Proto-Italic",
        "English terms derived from Proto-West Germanic",
        "English terms derived from the Proto-Indo-European root *tres-",
        "English terms suffixed with -er (agent noun)",
        "English terms suffixed with -er (agent suffix)",
        "Pages with 1 entry",
        "Pages with entries",
        "Pages with etymology trees"
      ],
      "glosses": [
        "One who, or that which, deters."
      ],
      "links": [
        [
          "deter",
          "deter"
        ]
      ],
      "synonyms": [
        {
          "word": "deterrent"
        }
      ]
    }
  ],
  "word": "deterrer"
}