"ef" meaning in Indonesian

{
  "etymology_templates": [
    {
      "args": {
        "1": "id",
        "2": "nl",
        "3": "ef"
      },
      "expansion": "Dutch ef",
      "name": "bor"
    }
  ],
  "etymology_text": "From Dutch ef.",
  "forms": [
    {
      "form": "èf",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ef-ef",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "èf"
      },
      "expansion": "èf (plural ef-ef)",
      "name": "id-noun"
    }
  ],
  "lang": "Indonesian",
  "lang_code": "id",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Indonesian entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages using lite templates",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 15 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "id",
          "name": "Latin letter names",
          "orig": "id:Latin letter names",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "The name of the Latin-script letter F/f."
      ],
      "id": "en-ef-id-noun-XBUsFHBn",
      "links": [
        [
          "F",
          "F#Indonesian"
        ],
        [
          "f",
          "f#Indonesian"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɛf/"
    },
    {
      "ipa": "[ɛf]"
    }
  ],
  "word": "ef"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "id",
        "2": "nl",
        "3": "ef"
      },
      "expansion": "Dutch ef",
      "name": "bor"
    }
  ],
  "etymology_text": "From Dutch ef.",
  "forms": [
    {
      "form": "èf",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "ef-ef",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "èf"
      },
      "expansion": "èf (plural ef-ef)",
      "name": "id-noun"
    }
  ],
  "lang": "Indonesian",
  "lang_code": "id",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Indonesian 1-syllable words",
        "Indonesian entries with incorrect language header",
        "Indonesian lemmas",
        "Indonesian nouns",
        "Indonesian terms borrowed from Dutch",
        "Indonesian terms derived from Dutch",
        "Indonesian terms with IPA pronunciation",
        "Pages using lite templates",
        "Pages with 15 entries",
        "Pages with entries",
        "id:Latin letter names"
      ],
      "glosses": [
        "The name of the Latin-script letter F/f."
      ],
      "links": [
        [
          "F",
          "F#Indonesian"
        ],
        [
          "f",
          "f#Indonesian"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ɛf/"
    },
    {
      "ipa": "[ɛf]"
    }
  ],
  "word": "ef"
}