"grincabez" meaning in Ido

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de verbes en ido",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Ido",
      "orig": "ido",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "Passé de l’impératif"
    }
  ],
  "lang": "Ido",
  "lang_code": "io",
  "pos": "verb",
  "pos_title": "Forme de verbe",
  "senses": [
    {
      "form_of": [
        {
          "word": "grincar"
        }
      ],
      "glosses": [
        "Passé de l’impératif du verbe grincar."
      ],
      "id": "fr-grincabez-io-verb-ZjLrdJ7V"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "grincabez"
}

{
  "categories": [
    "Formes de verbes en ido",
    "ido"
  ],
  "forms": [
    {
      "form": "Passé de l’impératif"
    }
  ],
  "lang": "Ido",
  "lang_code": "io",
  "pos": "verb",
  "pos_title": "Forme de verbe",
  "senses": [
    {
      "form_of": [
        {
          "word": "grincar"
        }
      ],
      "glosses": [
        "Passé de l’impératif du verbe grincar."
      ]
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "grincabez"
}