"rix" meaning in Gaulois

{
  "categories": [
    {
      "kind": "other",
      "name": "Mots attestés en gaulois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en gaulois issus d’un mot en indo-européen commun",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms communs en gaulois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Gaulois",
      "orig": "gaulois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Étymologies en gaulois incluant une reconstruction",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Mot attesté dans de nombreux noms propres : Ambiorix, Uercingetorix, Toutannorix, Ατεποριξ, etc.",
    "De l’indo-européen commun *rēĝs provenant de *h₃reĝ- (« orienter, diriger »).",
    "À comparer avec les mots ri en breton, rhi en gallois, rí en gaélique (sens identique), rex en latin."
  ],
  "lang": "Gaulois",
  "lang_code": "gaulois",
  "pos": "noun",
  "pos_title": "Nom commun",
  "related": [
    {
      "word": "-rix"
    },
    {
      "word": "ριξ"
    },
    {
      "word": "-ριξ"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Roi."
      ],
      "id": "fr-rix-gaulois-noun-5GVpaZFq"
    }
  ],
  "sounds": [
    {
      "ipa": "*\\rix\\"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "rix"
}

{
  "categories": [
    "Mots attestés en gaulois",
    "Mots en gaulois issus d’un mot en indo-européen commun",
    "Noms communs en gaulois",
    "gaulois",
    "Étymologies en gaulois incluant une reconstruction"
  ],
  "etymology_texts": [
    "Mot attesté dans de nombreux noms propres : Ambiorix, Uercingetorix, Toutannorix, Ατεποριξ, etc.",
    "De l’indo-européen commun *rēĝs provenant de *h₃reĝ- (« orienter, diriger »).",
    "À comparer avec les mots ri en breton, rhi en gallois, rí en gaélique (sens identique), rex en latin."
  ],
  "lang": "Gaulois",
  "lang_code": "gaulois",
  "pos": "noun",
  "pos_title": "Nom commun",
  "related": [
    {
      "word": "-rix"
    },
    {
      "word": "ριξ"
    },
    {
      "word": "-ριξ"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Roi."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "*\\rix\\"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "rix"
}