"-manka" meaning in Esperanto

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "manki",
        "3": "-a",
        "t1": "to lack"
      },
      "expansion": "manki (“to lack”) + -a",
      "name": "af"
    }
  ],
  "etymology_text": "From manki (“to lack”) + -a.",
  "head_templates": [
    {
      "args": {
        "1": "eo",
        "2": "suffix"
      },
      "expansion": "-manka",
      "name": "head"
    }
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "suffix",
  "senses": [
    {
      "antonyms": [
        {
          "word": "-riĉa"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Esperanto entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto terms suffixed with -a",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "-poor: relatively lacking in whatever property is indicated by the stem"
      ],
      "id": "en--manka-eo-suffix-wp3DTQS8",
      "links": [
        [
          "poor",
          "poor"
        ]
      ],
      "synonyms": [
        {
          "word": "sen-"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈmanka/"
    },
    {
      "rhymes": "-anka"
    }
  ],
  "word": "-manka"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "manki",
        "3": "-a",
        "t1": "to lack"
      },
      "expansion": "manki (“to lack”) + -a",
      "name": "af"
    }
  ],
  "etymology_text": "From manki (“to lack”) + -a.",
  "head_templates": [
    {
      "args": {
        "1": "eo",
        "2": "suffix"
      },
      "expansion": "-manka",
      "name": "head"
    }
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "suffix",
  "senses": [
    {
      "antonyms": [
        {
          "word": "-riĉa"
        }
      ],
      "categories": [
        "Esperanto entries with incorrect language header",
        "Esperanto lemmas",
        "Esperanto suffixes",
        "Esperanto terms suffixed with -a",
        "Esperanto terms with IPA pronunciation",
        "Rhymes:Esperanto/anka"
      ],
      "glosses": [
        "-poor: relatively lacking in whatever property is indicated by the stem"
      ],
      "links": [
        [
          "poor",
          "poor"
        ]
      ],
      "synonyms": [
        {
          "word": "sen-"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈmanka/"
    },
    {
      "rhymes": "-anka"
    }
  ],
  "word": "-manka"
}