"кисел" meaning in Bulgare

{
  "categories": [
    {
      "kind": "other",
      "name": "Adjectifs en bulgare",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Lemmes en bulgare",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en bulgare issus d’un mot en vieux slave",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Bulgare",
      "orig": "bulgare",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Du vieux slave кысѣлъ, kyselъ."
  ],
  "lang": "Bulgare",
  "lang_code": "bg",
  "pos": "adj",
  "pos_title": "Adjectif",
  "senses": [
    {
      "glosses": [
        "Aigre."
      ],
      "id": "fr-кисел-bg-adj-zppl6MLs"
    }
  ],
  "word": "кисел"
}

{
  "categories": [
    "Adjectifs en bulgare",
    "Lemmes en bulgare",
    "Mots en bulgare issus d’un mot en vieux slave",
    "bulgare"
  ],
  "etymology_texts": [
    "Du vieux slave кысѣлъ, kyselъ."
  ],
  "lang": "Bulgare",
  "lang_code": "bg",
  "pos": "adj",
  "pos_title": "Adjectif",
  "senses": [
    {
      "glosses": [
        "Aigre."
      ]
    }
  ],
  "word": "кисел"
}