"-ιστί" meaning in Ancient Greek

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "el",
            "2": "-ιστί"
          },
          "expansion": "Greek: -ιστί (-istí)",
          "name": "desc"
        }
      ],
      "text": "Greek: -ιστί (-istí)"
    }
  ],
  "etymology_text": "Adverbial form derived from -ίζω (-ízō)",
  "forms": [
    {
      "form": "-istí",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "-ιστί • (-istí)",
      "name": "grc-adverb"
    }
  ],
  "lang": "Ancient Greek",
  "lang_code": "grc",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Ancient Greek 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"
        }
      ],
      "examples": [
        {
          "text": "Ἀττικός (Attikós) + -ιστί (-istí) → ἀττικιστί (attikistí, “in the Attic dialect”)",
          "type": "example"
        },
        {
          "text": "Δωριεύς (Dōrieús) + -ιστί (-istí) → δωριστί (dōristí, “in the Doric dialect”)",
          "type": "example"
        },
        {
          "text": "Λατῖνος (Latînos) + -ιστί (-istí) → λατῑνιστί (latīnistí, “in the Latin language, in Latin”)",
          "type": "example"
        },
        {
          "text": "Πέρσης (Pérsēs) + -ιστί (-istí) → περσιστί (persistí, “in the Persian language, in Persian”)",
          "type": "example"
        }
      ],
      "glosses": [
        "Appended to names of peoples to denote to speak in their language or dialect"
      ],
      "id": "en--ιστί-grc-suffix-y5B-5B8S",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/is.tí/"
    },
    {
      "ipa": "/isˈti/"
    },
    {
      "ipa": "/isˈti/"
    },
    {
      "ipa": "/is.tí/",
      "note": "5ᵗʰ BCE Attic"
    },
    {
      "ipa": "/isˈti/",
      "note": "1ˢᵗ CE Egyptian"
    },
    {
      "ipa": "/isˈti/",
      "note": "4ᵗʰ CE Koine"
    },
    {
      "ipa": "/isˈti/",
      "note": "10ᵗʰ CE Byzantine"
    },
    {
      "ipa": "/isˈti/",
      "note": "15ᵗʰ CE Constantinopolitan"
    }
  ],
  "word": "-ιστί"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "el",
            "2": "-ιστί"
          },
          "expansion": "Greek: -ιστί (-istí)",
          "name": "desc"
        }
      ],
      "text": "Greek: -ιστί (-istí)"
    }
  ],
  "etymology_text": "Adverbial form derived from -ίζω (-ízō)",
  "forms": [
    {
      "form": "-istí",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "-ιστί • (-istí)",
      "name": "grc-adverb"
    }
  ],
  "lang": "Ancient Greek",
  "lang_code": "grc",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Ancient Greek 2-syllable words",
        "Ancient Greek adverb-forming suffixes",
        "Ancient Greek entries with incorrect language header",
        "Ancient Greek lemmas",
        "Ancient Greek oxytone terms",
        "Ancient Greek suffixes",
        "Ancient Greek terms with IPA pronunciation",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "Ἀττικός (Attikós) + -ιστί (-istí) → ἀττικιστί (attikistí, “in the Attic dialect”)",
          "type": "example"
        },
        {
          "text": "Δωριεύς (Dōrieús) + -ιστί (-istí) → δωριστί (dōristí, “in the Doric dialect”)",
          "type": "example"
        },
        {
          "text": "Λατῖνος (Latînos) + -ιστί (-istí) → λατῑνιστί (latīnistí, “in the Latin language, in Latin”)",
          "type": "example"
        },
        {
          "text": "Πέρσης (Pérsēs) + -ιστί (-istí) → περσιστί (persistí, “in the Persian language, in Persian”)",
          "type": "example"
        }
      ],
      "glosses": [
        "Appended to names of peoples to denote to speak in their language or dialect"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/is.tí/"
    },
    {
      "ipa": "/isˈti/"
    },
    {
      "ipa": "/isˈti/"
    },
    {
      "ipa": "/is.tí/",
      "note": "5ᵗʰ BCE Attic"
    },
    {
      "ipa": "/isˈti/",
      "note": "1ˢᵗ CE Egyptian"
    },
    {
      "ipa": "/isˈti/",
      "note": "4ᵗʰ CE Koine"
    },
    {
      "ipa": "/isˈti/",
      "note": "10ᵗʰ CE Byzantine"
    },
    {
      "ipa": "/isˈti/",
      "note": "15ᵗʰ CE Constantinopolitan"
    }
  ],
  "word": "-ιστί"
}