"-eres" meaning in Catalan

{
  "etymology_text": "The origin is unknown. This ending displaced -est, which was derived from Latin -istī, the second person singular present perfect indicative.",
  "head_templates": [
    {
      "args": {
        "1": "ca",
        "2": "suffix"
      },
      "expansion": "-eres",
      "name": "head"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Catalan entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Used to form the second person singular preterite indicative of second-conjugation verbs"
      ],
      "id": "en--eres-ca-suffix-3G7kw8-U",
      "links": [
        [
          "second-conjugation verbs",
          "-re#Catalan"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-eres"
}

{
  "etymology_text": "The origin is unknown. This ending displaced -est, which was derived from Latin -istī, the second person singular present perfect indicative.",
  "head_templates": [
    {
      "args": {
        "1": "ca",
        "2": "suffix"
      },
      "expansion": "-eres",
      "name": "head"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Catalan entries with incorrect language header",
        "Catalan lemmas",
        "Catalan suffixes",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "glosses": [
        "Used to form the second person singular preterite indicative of second-conjugation verbs"
      ],
      "links": [
        [
          "second-conjugation verbs",
          "-re#Catalan"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-eres"
}