"есмь" meaning in Russe

{
  "categories": [
    {
      "kind": "other",
      "name": "Formes de verbes en russe",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Supplétions en russe",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Russe",
      "orig": "russe",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    " ",
    "Cette forme dénote une supplétion car son étymologie est distincte de celle de быть, bytʹ."
  ],
  "lang": "Russe",
  "lang_code": "ru",
  "pos": "verb",
  "pos_title": "Forme de verbe",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Termes archaïques en russe",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "быть"
        }
      ],
      "glosses": [
        "Première personne du singulier du présent de быть."
      ],
      "id": "fr-есмь-ru-verb-tkJTdVsR",
      "tags": [
        "archaic"
      ]
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "есмь"
}

{
  "categories": [
    "Formes de verbes en russe",
    "Supplétions en russe",
    "russe"
  ],
  "etymology_texts": [
    " ",
    "Cette forme dénote une supplétion car son étymologie est distincte de celle de быть, bytʹ."
  ],
  "lang": "Russe",
  "lang_code": "ru",
  "pos": "verb",
  "pos_title": "Forme de verbe",
  "senses": [
    {
      "categories": [
        "Termes archaïques en russe"
      ],
      "form_of": [
        {
          "word": "быть"
        }
      ],
      "glosses": [
        "Première personne du singulier du présent de быть."
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "есмь"
}