"reg-" 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": "Verbes 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": [
    "Radical attesté à Lezoux et Chamalières dans regu^([1])^([2]).",
    "De l'indo-européen commun *h₃reĝ- (« diriger »)^([1])^([2])."
  ],
  "lang": "Gaulois",
  "lang_code": "gaulois",
  "pos": "verb",
  "pos_title": "Verbe",
  "senses": [
    {
      "glosses": [
        "Diriger."
      ],
      "id": "fr-reg--gaulois-verb-sXrRAuuK"
    }
  ],
  "word": "reg-"
}

{
  "categories": [
    "Mots attestés en gaulois",
    "Mots en gaulois issus d’un mot en indo-européen commun",
    "Verbes en gaulois",
    "gaulois",
    "Étymologies en gaulois incluant une reconstruction"
  ],
  "etymology_texts": [
    "Radical attesté à Lezoux et Chamalières dans regu^([1])^([2]).",
    "De l'indo-européen commun *h₃reĝ- (« diriger »)^([1])^([2])."
  ],
  "lang": "Gaulois",
  "lang_code": "gaulois",
  "pos": "verb",
  "pos_title": "Verbe",
  "senses": [
    {
      "glosses": [
        "Diriger."
      ]
    }
  ],
  "word": "reg-"
}