"messi-" 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"
    }
  ],
  "etymology_texts": [
    "Mot attesté dans différents noms propres tels que Međđu, Međđugnatus, Međđignatius, Međđilius, Messilus, etc.^([1])^([2]).",
    "De l’indo-européen commun *med- « modérer, juger »^([1])^([2]).",
    "Comparable au vieil irlandais mess."
  ],
  "lang": "Gaulois",
  "lang_code": "gaulois",
  "pos": "noun",
  "pos_title": "Nom commun",
  "related": [
    {
      "word": "međđu-"
    },
    {
      "word": "međđi-"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Jugement."
      ],
      "id": "fr-messi--gaulois-noun-vNAQUPRa"
    }
  ],
  "word": "messi-"
}

{
  "categories": [
    "Mots attestés en gaulois",
    "Mots en gaulois issus d’un mot en indo-européen commun",
    "Noms communs en gaulois",
    "gaulois"
  ],
  "etymology_texts": [
    "Mot attesté dans différents noms propres tels que Međđu, Međđugnatus, Međđignatius, Međđilius, Messilus, etc.^([1])^([2]).",
    "De l’indo-européen commun *med- « modérer, juger »^([1])^([2]).",
    "Comparable au vieil irlandais mess."
  ],
  "lang": "Gaulois",
  "lang_code": "gaulois",
  "pos": "noun",
  "pos_title": "Nom commun",
  "related": [
    {
      "word": "međđu-"
    },
    {
      "word": "međđi-"
    }
  ],
  "senses": [
    {
      "glosses": [
        "Jugement."
      ]
    }
  ],
  "word": "messi-"
}