"-ch" meaning in Tlingit

{
  "head_templates": [
    {
      "args": {
        "1": "tli",
        "2": "suffix"
      },
      "expansion": "-ch",
      "name": "head"
    }
  ],
  "lang": "Tlingit",
  "lang_code": "tli",
  "pos": "suffix",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "english": "My mother loves my father.",
          "text": "Ax̱ tláach ax̱ éesh asix̱án",
          "type": "example"
        }
      ],
      "glosses": [
        "Used to form the ergative case."
      ],
      "id": "en--ch-tli-suffix-6rvl5oI7",
      "links": [
        [
          "ergative",
          "ergative#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "categories": [
        {
          "_dis": "15 22 15 15 3 30",
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "15 23 15 15 2 31",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "5 95",
          "kind": "other",
          "name": "Tlingit entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Marks the habitual aspect."
      ],
      "id": "en--ch-tli-suffix-gTSaCV~N",
      "links": [
        [
          "habitual",
          "habitual#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ch"
}

{
  "categories": [
    "Pages with 4 entries",
    "Pages with entries",
    "Tlingit entries with incorrect language header",
    "Tlingit lemmas",
    "Tlingit suffixes"
  ],
  "head_templates": [
    {
      "args": {
        "1": "tli",
        "2": "suffix"
      },
      "expansion": "-ch",
      "name": "head"
    }
  ],
  "lang": "Tlingit",
  "lang_code": "tli",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Tlingit terms with usage examples"
      ],
      "examples": [
        {
          "english": "My mother loves my father.",
          "text": "Ax̱ tláach ax̱ éesh asix̱án",
          "type": "example"
        }
      ],
      "glosses": [
        "Used to form the ergative case."
      ],
      "links": [
        [
          "ergative",
          "ergative#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "glosses": [
        "Marks the habitual aspect."
      ],
      "links": [
        [
          "habitual",
          "habitual#English"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-ch"
}