"ero" meaning in Italian

{
  "etymology_number": 1,
  "head_templates": [
    {
      "args": {
        "1": "it",
        "2": "verb form"
      },
      "expansion": "ero",
      "name": "head"
    }
  ],
  "hyphenation": [
    "è‧ro"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "_dis": "9 91",
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "form_of": [
        {
          "extra": "(I) was",
          "word": "essere"
        }
      ],
      "glosses": [
        "first-person singular imperfect indicative of essere; (I) was"
      ],
      "id": "en-ero-it-verb-YHXIn9Yh",
      "links": [
        [
          "essere",
          "essere#Italian"
        ],
        [
          "was",
          "was"
        ]
      ],
      "tags": [
        "first-person",
        "form-of",
        "imperfect",
        "indicative",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈɛ.ro/"
    },
    {
      "rhymes": "-ɛro"
    }
  ],
  "word": "ero"
}

{
  "etymology_number": 2,
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "eroina"
      },
      "expansion": "Clipping of eroina",
      "name": "clipping"
    }
  ],
  "etymology_text": "Clipping of eroina.",
  "head_templates": [
    {
      "args": {
        "1": "it",
        "2": "noun",
        "g": "f"
      },
      "expansion": "ero f",
      "name": "head"
    }
  ],
  "hyphenation": [
    "è‧ro"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "70 30",
          "kind": "topical",
          "langcode": "it",
          "name": "Recreational drugs",
          "orig": "it:Recreational drugs",
          "parents": [
            "Drugs",
            "Matter",
            "Pharmacology",
            "Chemistry",
            "Nature",
            "Biochemistry",
            "Medicine",
            "Sciences",
            "All topics",
            "Biology",
            "Healthcare",
            "Fundamental",
            "Health",
            "Body"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "heroin"
      ],
      "id": "en-ero-it-noun-7m8BqS3Y",
      "links": [
        [
          "heroin",
          "heroin"
        ]
      ],
      "raw_glosses": [
        "(slang) heroin"
      ],
      "tags": [
        "feminine",
        "slang"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈɛ.ro/"
    },
    {
      "rhymes": "-ɛro"
    }
  ],
  "word": "ero"
}

{
  "categories": [
    "Italian 2-syllable words",
    "Italian clippings",
    "Italian entries with incorrect language header",
    "Italian feminine nouns",
    "Italian lemmas",
    "Italian non-lemma forms",
    "Italian nouns",
    "Italian terms with IPA pronunciation",
    "Italian verb forms",
    "Pages with 18 entries",
    "Pages with entries",
    "Rhymes:Italian/ɛro",
    "Rhymes:Italian/ɛro/2 syllables",
    "it:Recreational drugs"
  ],
  "etymology_number": 1,
  "head_templates": [
    {
      "args": {
        "1": "it",
        "2": "verb form"
      },
      "expansion": "ero",
      "name": "head"
    }
  ],
  "hyphenation": [
    "è‧ro"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "verb",
  "senses": [
    {
      "form_of": [
        {
          "extra": "(I) was",
          "word": "essere"
        }
      ],
      "glosses": [
        "first-person singular imperfect indicative of essere; (I) was"
      ],
      "links": [
        [
          "essere",
          "essere#Italian"
        ],
        [
          "was",
          "was"
        ]
      ],
      "tags": [
        "first-person",
        "form-of",
        "imperfect",
        "indicative",
        "singular"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈɛ.ro/"
    },
    {
      "rhymes": "-ɛro"
    }
  ],
  "word": "ero"
}

{
  "categories": [
    "Italian 2-syllable words",
    "Italian clippings",
    "Italian entries with incorrect language header",
    "Italian feminine nouns",
    "Italian lemmas",
    "Italian nouns",
    "Italian terms with IPA pronunciation",
    "Pages with 18 entries",
    "Pages with entries",
    "Rhymes:Italian/ɛro",
    "Rhymes:Italian/ɛro/2 syllables",
    "it:Recreational drugs"
  ],
  "etymology_number": 2,
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "eroina"
      },
      "expansion": "Clipping of eroina",
      "name": "clipping"
    }
  ],
  "etymology_text": "Clipping of eroina.",
  "head_templates": [
    {
      "args": {
        "1": "it",
        "2": "noun",
        "g": "f"
      },
      "expansion": "ero f",
      "name": "head"
    }
  ],
  "hyphenation": [
    "è‧ro"
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Italian slang"
      ],
      "glosses": [
        "heroin"
      ],
      "links": [
        [
          "heroin",
          "heroin"
        ]
      ],
      "raw_glosses": [
        "(slang) heroin"
      ],
      "tags": [
        "feminine",
        "slang"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈɛ.ro/"
    },
    {
      "rhymes": "-ɛro"
    }
  ],
  "word": "ero"
}