"-ast" meaning in Swedish

{
  "etymology_templates": [
    {
      "args": {
        "1": "sv",
        "2": "non",
        "3": "-astr"
      },
      "expansion": "Old Norse -astr",
      "name": "der"
    },
    {
      "args": {
        "1": "sv",
        "2": "gem-pro",
        "3": "*-ōstaz"
      },
      "expansion": "Proto-Germanic *-ōstaz",
      "name": "der"
    }
  ],
  "etymology_text": "From Old Norse -astr, from Proto-Germanic *-ōstaz.",
  "head_templates": [
    {
      "args": {
        "1": "sv",
        "2": "suffix"
      },
      "expansion": "-ast",
      "name": "head"
    }
  ],
  "lang": "Swedish",
  "lang_code": "sv",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Swedish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "creates superlative of an adjective, if the noun comes before the adjective, and the noun is in indefinite singular form."
      ],
      "id": "en--ast-sv-suffix-vQhwbyvm",
      "links": [
        [
          "superlative",
          "superlative"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ast"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "sv",
        "2": "non",
        "3": "-astr"
      },
      "expansion": "Old Norse -astr",
      "name": "der"
    },
    {
      "args": {
        "1": "sv",
        "2": "gem-pro",
        "3": "*-ōstaz"
      },
      "expansion": "Proto-Germanic *-ōstaz",
      "name": "der"
    }
  ],
  "etymology_text": "From Old Norse -astr, from Proto-Germanic *-ōstaz.",
  "head_templates": [
    {
      "args": {
        "1": "sv",
        "2": "suffix"
      },
      "expansion": "-ast",
      "name": "head"
    }
  ],
  "lang": "Swedish",
  "lang_code": "sv",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Pages with 4 entries",
        "Pages with entries",
        "Swedish entries with incorrect language header",
        "Swedish lemmas",
        "Swedish suffixes",
        "Swedish terms derived from Old Norse",
        "Swedish terms derived from Proto-Germanic"
      ],
      "glosses": [
        "creates superlative of an adjective, if the noun comes before the adjective, and the noun is in indefinite singular form."
      ],
      "links": [
        [
          "superlative",
          "superlative"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ast"
}