"как си" meaning in Bulgare

{
  "categories": [
    {
      "kind": "other",
      "name": "Lemmes en bulgare",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions-phrases en bulgare",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Bulgare",
      "orig": "bulgare",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Bulgare",
  "lang_code": "bg",
  "pos": "phrase",
  "pos_title": "Locution-phrase",
  "senses": [
    {
      "glosses": [
        "Comment vas-tu ?"
      ],
      "id": "fr-как_си-bg-phrase-a6WqOK4j"
    }
  ],
  "sounds": [
    {
      "ipa": "\\kak si\\"
    }
  ],
  "word": "как си"
}

{
  "categories": [
    "Lemmes en bulgare",
    "Locutions-phrases en bulgare",
    "bulgare"
  ],
  "lang": "Bulgare",
  "lang_code": "bg",
  "pos": "phrase",
  "pos_title": "Locution-phrase",
  "senses": [
    {
      "glosses": [
        "Comment vas-tu ?"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\kak si\\"
    }
  ],
  "word": "как си"
}