"fflach" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "en",
        "3": "flash"
      },
      "expansion": "English flash",
      "name": "bor"
    },
    {
      "args": {
        "1": "cy",
        "2": "llach"
      },
      "expansion": "llach",
      "name": "l"
    },
    {
      "args": {
        "1": "cy",
        "2": "en",
        "3": "slash"
      },
      "expansion": "English slash",
      "name": "bor"
    }
  ],
  "etymology_text": "Borrowed from English flash. Cf. llach from English slash.",
  "forms": [
    {
      "form": "fflachiau",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "fflachiau"
      },
      "expansion": "fflach m (plural fflachiau, not mutable)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "flash"
      ],
      "id": "en-fflach-cy-noun-hR5DvUSi",
      "links": [
        [
          "flash",
          "flash"
        ]
      ],
      "tags": [
        "masculine",
        "not-mutable"
      ]
    },
    {
      "categories": [
        {
          "_dis": "30 70",
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "instant, moment"
      ],
      "id": "en-fflach-cy-noun-NrGzliEb",
      "links": [
        [
          "instant",
          "instant"
        ],
        [
          "moment",
          "moment"
        ]
      ],
      "tags": [
        "masculine",
        "not-mutable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/flaːχ/"
    },
    {
      "rhymes": "-aːχ"
    }
  ],
  "word": "fflach"
}

{
  "categories": [
    "Rhymes:Welsh/aːχ",
    "Welsh countable nouns",
    "Welsh entries with incorrect language header",
    "Welsh lemmas",
    "Welsh masculine nouns",
    "Welsh non-mutable terms",
    "Welsh nouns",
    "Welsh nouns with red links in their headword lines",
    "Welsh terms borrowed from English",
    "Welsh terms derived from English",
    "Welsh terms with IPA pronunciation"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "en",
        "3": "flash"
      },
      "expansion": "English flash",
      "name": "bor"
    },
    {
      "args": {
        "1": "cy",
        "2": "llach"
      },
      "expansion": "llach",
      "name": "l"
    },
    {
      "args": {
        "1": "cy",
        "2": "en",
        "3": "slash"
      },
      "expansion": "English slash",
      "name": "bor"
    }
  ],
  "etymology_text": "Borrowed from English flash. Cf. llach from English slash.",
  "forms": [
    {
      "form": "fflachiau",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "fflachiau"
      },
      "expansion": "fflach m (plural fflachiau, not mutable)",
      "name": "cy-noun"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "flash"
      ],
      "links": [
        [
          "flash",
          "flash"
        ]
      ],
      "tags": [
        "masculine",
        "not-mutable"
      ]
    },
    {
      "glosses": [
        "instant, moment"
      ],
      "links": [
        [
          "instant",
          "instant"
        ],
        [
          "moment",
          "moment"
        ]
      ],
      "tags": [
        "masculine",
        "not-mutable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/flaːχ/"
    },
    {
      "rhymes": "-aːχ"
    }
  ],
  "word": "fflach"
}