"retero" meaning in Latin

{
  "categories": [
    {
      "kind": "other",
      "name": "Dérivations en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Lemmes en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en latin préfixés avec re-",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Verbes en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Verbes transitifs en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Latin",
      "orig": "latin",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "translation": "dépôt, sédiment, résidu ; scorie ; excrément",
      "word": "retrimentum"
    },
    {
      "translation": "usé par frottement",
      "word": "retritus"
    }
  ],
  "etymology_texts": [
    "Dérivé de tero, avec le préfixe re-."
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "verb",
  "pos_title": "Verbe",
  "raw_tags": [
    "reterō, infinitif : reterere, parfait : retrīvi, supin : retrītum"
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Wiktionnaire:Exemples manquants en latin",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "User en frottant."
      ],
      "id": "fr-retero-la-verb-YnmvkcTN"
    }
  ],
  "synonyms": [
    {
      "word": "detero"
    }
  ],
  "tags": [
    "transitive"
  ],
  "word": "retero"
}

{
  "categories": [
    "Dérivations en latin",
    "Lemmes en latin",
    "Mots en latin préfixés avec re-",
    "Verbes en latin",
    "Verbes transitifs en latin",
    "latin"
  ],
  "derived": [
    {
      "translation": "dépôt, sédiment, résidu ; scorie ; excrément",
      "word": "retrimentum"
    },
    {
      "translation": "usé par frottement",
      "word": "retritus"
    }
  ],
  "etymology_texts": [
    "Dérivé de tero, avec le préfixe re-."
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "verb",
  "pos_title": "Verbe",
  "raw_tags": [
    "reterō, infinitif : reterere, parfait : retrīvi, supin : retrītum"
  ],
  "senses": [
    {
      "categories": [
        "Wiktionnaire:Exemples manquants en latin"
      ],
      "glosses": [
        "User en frottant."
      ]
    }
  ],
  "synonyms": [
    {
      "word": "detero"
    }
  ],
  "tags": [
    "transitive"
  ],
  "word": "retero"
}