"torstaisin" meaning in Finnois

{
  "categories": [
    {
      "kind": "other",
      "name": "Adverbes en finnois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Lemmes en finnois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Finnois",
      "orig": "finnois",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Dérivé multiplicatif de torstai par le suffixe -sin."
  ],
  "lang": "Finnois",
  "lang_code": "fi",
  "pos": "adv",
  "pos_title": "Adverbe",
  "senses": [
    {
      "glosses": [
        "Les jeudis."
      ],
      "id": "fr-torstaisin-fi-adv-tBvHcNrf"
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈtors.tɑi.sin\\"
    }
  ],
  "tags": [
    "invariable"
  ],
  "word": "torstaisin"
}

{
  "categories": [
    "Adverbes en finnois",
    "Lemmes en finnois",
    "finnois"
  ],
  "etymology_texts": [
    "Dérivé multiplicatif de torstai par le suffixe -sin."
  ],
  "lang": "Finnois",
  "lang_code": "fi",
  "pos": "adv",
  "pos_title": "Adverbe",
  "senses": [
    {
      "glosses": [
        "Les jeudis."
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\ˈtors.tɑi.sin\\"
    }
  ],
  "tags": [
    "invariable"
  ],
  "word": "torstaisin"
}