"cʼhoullo" meaning in Breton

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes d’adjectifs en breton",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Breton",
      "orig": "breton",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "goullo",
      "tags": [
        "unmutated"
      ]
    }
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "adj",
  "pos_title": "Forme d’adjectif",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en breton",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              11,
              17
            ]
          ],
          "ref": "Jules Gros, Le trésor du breton parlé - Deuxième partie - Dictionnaire breton-français des expressions figurées, 1ère ed. 1970, p. 185",
          "text": "Ne rez tro houllo ebed.",
          "translation": "Tu ne fais aucune tournée à vide (sans chargement), inutile."
        }
      ],
      "form_of": [
        {
          "word": "goullo"
        }
      ],
      "glosses": [
        "Forme mutée de goullo par adoucissement (g > cʼh)."
      ],
      "id": "fr-cʼhoullo-br-adj-D8ypFuFc"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈɣulːo\\"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "cʼhoullo"
}

{
  "categories": [
    "Formes d’adjectifs en breton",
    "breton"
  ],
  "forms": [
    {
      "form": "goullo",
      "tags": [
        "unmutated"
      ]
    }
  ],
  "lang": "Breton",
  "lang_code": "br",
  "pos": "adj",
  "pos_title": "Forme d’adjectif",
  "senses": [
    {
      "categories": [
        "Exemples en breton"
      ],
      "examples": [
        {
          "bold_text_offsets": [
            [
              11,
              17
            ]
          ],
          "ref": "Jules Gros, Le trésor du breton parlé - Deuxième partie - Dictionnaire breton-français des expressions figurées, 1ère ed. 1970, p. 185",
          "text": "Ne rez tro houllo ebed.",
          "translation": "Tu ne fais aucune tournée à vide (sans chargement), inutile."
        }
      ],
      "form_of": [
        {
          "word": "goullo"
        }
      ],
      "glosses": [
        "Forme mutée de goullo par adoucissement (g > cʼh)."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈɣulːo\\"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "cʼhoullo"
}