"eta" meaning in Portuguese

{
  "head_templates": [
    {
      "args": {
        "1": "pt",
        "2": "intj"
      },
      "expansion": "eta",
      "name": "head"
    }
  ],
  "hyphenation": [
    "e‧ta"
  ],
  "lang": "Portuguese",
  "lang_code": "pt",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 24 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Portuguese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "expresses surprise"
      ],
      "id": "en-eta-pt-intj-m3255oQM",
      "synonyms": [
        {
          "tags": [
            "Brazil"
          ],
          "word": "eita"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈe.tɐ/"
    },
    {
      "rhymes": "-etɐ"
    }
  ],
  "word": "eta"
}

{
  "head_templates": [
    {
      "args": {
        "1": "pt",
        "2": "intj"
      },
      "expansion": "eta",
      "name": "head"
    }
  ],
  "hyphenation": [
    "e‧ta"
  ],
  "lang": "Portuguese",
  "lang_code": "pt",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "Pages with 24 entries",
        "Pages with entries",
        "Portuguese 2-syllable words",
        "Portuguese entries with incorrect language header",
        "Portuguese interjections",
        "Portuguese lemmas",
        "Portuguese terms with IPA pronunciation",
        "Rhymes:Portuguese/etɐ",
        "Rhymes:Portuguese/etɐ/2 syllables"
      ],
      "glosses": [
        "expresses surprise"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈe.tɐ/"
    },
    {
      "rhymes": "-etɐ"
    }
  ],
  "synonyms": [
    {
      "tags": [
        "Brazil"
      ],
      "word": "eita"
    }
  ],
  "word": "eta"
}