"श्वा" meaning in Sanskrit

{
  "forms": [
    {
      "form": "śvā",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "श्वा • (śvā) stem, ?",
      "name": "sa-noun"
    }
  ],
  "lang": "Sanskrit",
  "lang_code": "sa",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Sanskrit entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "extra": "śvan",
          "word": "श्वन्"
        }
      ],
      "glosses": [
        "nominative singular of श्वन् (śvan)"
      ],
      "id": "en-श्वा-sa-noun-CUIlXa5J",
      "links": [
        [
          "श्वन्",
          "श्वन्#Sanskrit"
        ]
      ],
      "tags": [
        "form-of",
        "nominative",
        "singular"
      ]
    }
  ],
  "word": "श्वा"
}

{
  "forms": [
    {
      "form": "śvā",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "श्वा • (śvā) stem, ?",
      "name": "sa-noun"
    }
  ],
  "lang": "Sanskrit",
  "lang_code": "sa",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Requests for gender in Sanskrit entries",
        "Sanskrit entries with incorrect language header",
        "Sanskrit lemmas",
        "Sanskrit nouns",
        "Sanskrit nouns in Devanagari script"
      ],
      "form_of": [
        {
          "extra": "śvan",
          "word": "श्वन्"
        }
      ],
      "glosses": [
        "nominative singular of श्वन् (śvan)"
      ],
      "links": [
        [
          "श्वन्",
          "श्वन्#Sanskrit"
        ]
      ],
      "tags": [
        "form-of",
        "nominative",
        "singular"
      ]
    }
  ],
  "word": "श्वा"
}