"-sch" meaning in Dutch

{
  "etymology_templates": [
    {
      "args": {
        "1": "nl",
        "2": "dum",
        "3": "-sch"
      },
      "expansion": "Middle Dutch -sch",
      "name": "inh"
    }
  ],
  "etymology_text": "From Middle Dutch -sch.",
  "head_templates": [
    {
      "args": {
        "1": "nl",
        "2": "suffix",
        "cat2": "adjective-forming suffixes"
      },
      "expansion": "-sch",
      "name": "head"
    }
  ],
  "lang": "Dutch",
  "lang_code": "nl",
  "pos": "suffix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "suffix forming adjectives",
          "word": "-s"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Dutch entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Archaic form of -s (“suffix forming adjectives”)."
      ],
      "id": "en--sch-nl-suffix-pkAYLJ9Q",
      "links": [
        [
          "-s",
          "-s#Dutch:_adjective"
        ]
      ],
      "tags": [
        "alt-of",
        "archaic",
        "morpheme"
      ]
    }
  ],
  "word": "-sch"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "nl",
        "2": "dum",
        "3": "-sch"
      },
      "expansion": "Middle Dutch -sch",
      "name": "inh"
    }
  ],
  "etymology_text": "From Middle Dutch -sch.",
  "head_templates": [
    {
      "args": {
        "1": "nl",
        "2": "suffix",
        "cat2": "adjective-forming suffixes"
      },
      "expansion": "-sch",
      "name": "head"
    }
  ],
  "lang": "Dutch",
  "lang_code": "nl",
  "pos": "suffix",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "suffix forming adjectives",
          "word": "-s"
        }
      ],
      "categories": [
        "Dutch adjective-forming suffixes",
        "Dutch archaic forms",
        "Dutch entries with incorrect language header",
        "Dutch lemmas",
        "Dutch suffixes",
        "Dutch terms derived from Middle Dutch",
        "Dutch terms inherited from Middle Dutch",
        "Pages with 3 entries",
        "Pages with entries"
      ],
      "glosses": [
        "Archaic form of -s (“suffix forming adjectives”)."
      ],
      "links": [
        [
          "-s",
          "-s#Dutch:_adjective"
        ]
      ],
      "tags": [
        "alt-of",
        "archaic",
        "morpheme"
      ]
    }
  ],
  "word": "-sch"
}