"fosti" meaning in Italien

{
  "anagrams": [
    {
      "word": "Fotis"
    }
  ],
  "categories": [
    {
      "kind": "other",
      "name": "Formes de verbes en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en italien issus d’un mot en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Supplétions en italien",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Italien",
      "orig": "italien",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Du latin fuistī. Cette forme dénote une supplétion car son étymologie est distincte de celle de essere."
  ],
  "forms": [
    {
      "form": "(tu) fosti",
      "tags": [
        "past"
      ]
    }
  ],
  "lang": "Italien",
  "lang_code": "it",
  "pos": "verb",
  "pos_title": "Forme de verbe",
  "senses": [
    {
      "form_of": [
        {
          "word": "essere"
        }
      ],
      "glosses": [
        "Deuxième personne du singulier du passé simple de essere."
      ],
      "id": "fr-fosti-it-verb-xcz0uocY"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈfos.ti\\"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "fosti"
}

{
  "anagrams": [
    {
      "word": "Fotis"
    }
  ],
  "categories": [
    "Formes de verbes en italien",
    "Mots en italien issus d’un mot en latin",
    "Supplétions en italien",
    "italien"
  ],
  "etymology_texts": [
    "Du latin fuistī. Cette forme dénote une supplétion car son étymologie est distincte de celle de essere."
  ],
  "forms": [
    {
      "form": "(tu) fosti",
      "tags": [
        "past"
      ]
    }
  ],
  "lang": "Italien",
  "lang_code": "it",
  "pos": "verb",
  "pos_title": "Forme de verbe",
  "senses": [
    {
      "form_of": [
        {
          "word": "essere"
        }
      ],
      "glosses": [
        "Deuxième personne du singulier du passé simple de essere."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈfos.ti\\"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "fosti"
}