"-ei" meaning in Italian

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "VL.",
        "3": "-"
      },
      "expansion": "Vulgar Latin",
      "name": "uder"
    },
    {
      "args": {
        "1": "it",
        "2": "la",
        "3": "habuī"
      },
      "expansion": "Latin habuī",
      "name": "uder"
    }
  ],
  "etymology_text": "From Vulgar Latin hĕbui / (h)ĕ(bu)i, which stems from classical Latin habuī, first-person singular perfect of habeō.\nSee -erei.",
  "lang": "Italian",
  "lang_code": "it",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Italian undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 9 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "used with a stem to form the first-person singular past historic of regular -ere verbs"
      ],
      "id": "en--ei-it-suffix-SKxSi1Ey",
      "links": [
        [
          "first-person",
          "first person#English"
        ],
        [
          "singular",
          "singular#English"
        ],
        [
          "past historic",
          "past historic#English"
        ],
        [
          "-ere",
          "-ere#Italian"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ei"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "VL.",
        "3": "-"
      },
      "expansion": "Vulgar Latin",
      "name": "uder"
    },
    {
      "args": {
        "1": "it",
        "2": "la",
        "3": "habuī"
      },
      "expansion": "Latin habuī",
      "name": "uder"
    }
  ],
  "etymology_text": "From Vulgar Latin hĕbui / (h)ĕ(bu)i, which stems from classical Latin habuī, first-person singular perfect of habeō.\nSee -erei.",
  "lang": "Italian",
  "lang_code": "it",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Italian entries with incorrect language header",
        "Italian non-lemma forms",
        "Italian suffix forms",
        "Italian terms derived from Latin",
        "Italian terms derived from Vulgar Latin",
        "Italian undefined derivations",
        "Pages with 9 entries",
        "Pages with entries"
      ],
      "glosses": [
        "used with a stem to form the first-person singular past historic of regular -ere verbs"
      ],
      "links": [
        [
          "first-person",
          "first person#English"
        ],
        [
          "singular",
          "singular#English"
        ],
        [
          "past historic",
          "past historic#English"
        ],
        [
          "-ere",
          "-ere#Italian"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ei"
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: non-lemma form of verb-forming suffix",
  "path": [
    "-ei"
  ],
  "section": "Italian",
  "subsection": "suffix",
  "title": "-ei",
  "trace": ""
}