"-em" meaning in Catalan

{
  "etymology_text": "From Latin -ēmus, the active ending for the first person plural in the Latin second conjugation. The final *-us was lost due to analogy with the Latin second declension (which also ended in -us); had that not been lost, the result would have been *-emos or *-emes. Displaced -āmus, the active ending of the first person plural, which likely would have yielded *-amos or *-ames (or *-am, with loss of the final *-us).",
  "head_templates": [
    {
      "args": {
        "1": "ca",
        "2": "suffix"
      },
      "expansion": "-em",
      "name": "head"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Catalan entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 14 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Used to form the first person plural present indicative of first and second conjugation verbs"
      ],
      "id": "en--em-ca-suffix-HkvI3P6y",
      "links": [
        [
          "first",
          "-ar#Catalan"
        ],
        [
          "second",
          "-re#Catalan"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-em"
}

{
  "etymology_text": "From Latin -ēmus, the active ending for the first person plural in the Latin second conjugation. The final *-us was lost due to analogy with the Latin second declension (which also ended in -us); had that not been lost, the result would have been *-emos or *-emes. Displaced -āmus, the active ending of the first person plural, which likely would have yielded *-amos or *-ames (or *-am, with loss of the final *-us).",
  "head_templates": [
    {
      "args": {
        "1": "ca",
        "2": "suffix"
      },
      "expansion": "-em",
      "name": "head"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Catalan entries with incorrect language header",
        "Catalan lemmas",
        "Catalan suffixes",
        "Pages with 14 entries",
        "Pages with entries"
      ],
      "glosses": [
        "Used to form the first person plural present indicative of first and second conjugation verbs"
      ],
      "links": [
        [
          "first",
          "-ar#Catalan"
        ],
        [
          "second",
          "-re#Catalan"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-em"
}