"-tre" meaning in Old Occitan

{
  "etymology_text": "Possibly inherited from the Latin equivalent -iter. Found in such words as seguentre, auzentre, and vezentre.",
  "head_templates": [
    {
      "args": {
        "1": "pro",
        "2": "suffix"
      },
      "expansion": "-tre",
      "name": "head"
    }
  ],
  "lang": "Old Occitan",
  "lang_code": "pro",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old Occitan entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "adverb-forming suffix"
      ],
      "id": "en--tre-pro-suffix-kzXmGQob",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/tɾe/"
    }
  ],
  "word": "-tre"
}

{
  "etymology_text": "Possibly inherited from the Latin equivalent -iter. Found in such words as seguentre, auzentre, and vezentre.",
  "head_templates": [
    {
      "args": {
        "1": "pro",
        "2": "suffix"
      },
      "expansion": "-tre",
      "name": "head"
    }
  ],
  "lang": "Old Occitan",
  "lang_code": "pro",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Old Occitan entries with incorrect language header",
        "Old Occitan lemmas",
        "Old Occitan suffixes",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "adverb-forming suffix"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/tɾe/"
    }
  ],
  "word": "-tre"
}