"-st" meaning in Icelandic

{
  "etymology_templates": [
    {
      "args": {
        "1": "is",
        "2": "non",
        "3": "-sk"
      },
      "expansion": "Old Norse -sk",
      "name": "inh"
    },
    {
      "args": {
        "1": "non",
        "2": "sik"
      },
      "expansion": "sik",
      "name": "m"
    },
    {
      "args": {
        "1": "is",
        "2": "sig"
      },
      "expansion": "Icelandic sig",
      "name": "cog"
    }
  ],
  "etymology_text": "From Old Norse -sk, reduced form of the reflexive pronoun sik (whence Icelandic sig).",
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "suffix",
        "sort": "st"
      },
      "expansion": "-st",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Icelandic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Icelandic terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "berast"
        },
        {
          "word": "biðjast"
        },
        {
          "word": "bjóðast"
        },
        {
          "word": "bregðast"
        },
        {
          "word": "brjótast"
        },
        {
          "word": "drepast"
        },
        {
          "word": "elskast"
        },
        {
          "word": "eyðast"
        },
        {
          "word": "fást"
        },
        {
          "word": "finnast"
        },
        {
          "word": "gerast"
        },
        {
          "word": "gleðjast"
        },
        {
          "word": "haldast"
        },
        {
          "word": "heilsast"
        },
        {
          "word": "kveðjast"
        },
        {
          "word": "kyssast"
        },
        {
          "word": "látast"
        },
        {
          "word": "leiðast"
        },
        {
          "word": "líðast"
        },
        {
          "word": "minnast"
        },
        {
          "word": "segjast"
        },
        {
          "word": "setjast"
        },
        {
          "word": "sjást"
        },
        {
          "word": "týnast"
        },
        {
          "word": "tærast"
        },
        {
          "word": "venjast"
        },
        {
          "word": "virðast"
        },
        {
          "word": "ætlast"
        }
      ],
      "glosses": [
        "turns verbs into middle voice verbs"
      ],
      "id": "en--st-is-suffix-PkLhFVJ3",
      "links": [
        [
          "verbs",
          "verbs"
        ],
        [
          "middle voice verb",
          "middle voice verb"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-st"
}

{
  "derived": [
    {
      "word": "berast"
    },
    {
      "word": "biðjast"
    },
    {
      "word": "bjóðast"
    },
    {
      "word": "bregðast"
    },
    {
      "word": "brjótast"
    },
    {
      "word": "drepast"
    },
    {
      "word": "elskast"
    },
    {
      "word": "eyðast"
    },
    {
      "word": "fást"
    },
    {
      "word": "finnast"
    },
    {
      "word": "gerast"
    },
    {
      "word": "gleðjast"
    },
    {
      "word": "haldast"
    },
    {
      "word": "heilsast"
    },
    {
      "word": "kveðjast"
    },
    {
      "word": "kyssast"
    },
    {
      "word": "látast"
    },
    {
      "word": "leiðast"
    },
    {
      "word": "líðast"
    },
    {
      "word": "minnast"
    },
    {
      "word": "segjast"
    },
    {
      "word": "setjast"
    },
    {
      "word": "sjást"
    },
    {
      "word": "týnast"
    },
    {
      "word": "tærast"
    },
    {
      "word": "venjast"
    },
    {
      "word": "virðast"
    },
    {
      "word": "ætlast"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "is",
        "2": "non",
        "3": "-sk"
      },
      "expansion": "Old Norse -sk",
      "name": "inh"
    },
    {
      "args": {
        "1": "non",
        "2": "sik"
      },
      "expansion": "sik",
      "name": "m"
    },
    {
      "args": {
        "1": "is",
        "2": "sig"
      },
      "expansion": "Icelandic sig",
      "name": "cog"
    }
  ],
  "etymology_text": "From Old Norse -sk, reduced form of the reflexive pronoun sik (whence Icelandic sig).",
  "head_templates": [
    {
      "args": {
        "1": "is",
        "2": "suffix",
        "sort": "st"
      },
      "expansion": "-st",
      "name": "head"
    }
  ],
  "lang": "Icelandic",
  "lang_code": "is",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Icelandic entries with incorrect language header",
        "Icelandic lemmas",
        "Icelandic suffixes",
        "Icelandic terms derived from Old Norse",
        "Icelandic terms inherited from Old Norse",
        "Icelandic terms with redundant sortkeys"
      ],
      "glosses": [
        "turns verbs into middle voice verbs"
      ],
      "links": [
        [
          "verbs",
          "verbs"
        ],
        [
          "middle voice verb",
          "middle voice verb"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-st"
}