"-aja" meaning in Serbo-Croatian

{
  "etymology_templates": [
    {
      "args": {
        "1": "sh"
      },
      "expansion": "Uncertain",
      "name": "unc"
    }
  ],
  "etymology_text": "Uncertain, possibly related to -aj.",
  "forms": [
    {
      "form": "-аја",
      "tags": [
        "Cyrillic"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "-aja (Cyrillic spelling -аја)",
      "name": "sh-suffix"
    }
  ],
  "lang": "Serbo-Croatian",
  "lang_code": "sh",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages using catfix",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Serbo-Croatian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Suffix appended to nouns, adjectives or verbs to create a feminine noun."
      ],
      "id": "en--aja-sh-suffix-ABFR0d1b",
      "related": [
        {
          "word": "-jaja"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-aja"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "sh"
      },
      "expansion": "Uncertain",
      "name": "unc"
    }
  ],
  "etymology_text": "Uncertain, possibly related to -aj.",
  "forms": [
    {
      "form": "-аја",
      "tags": [
        "Cyrillic"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "-aja (Cyrillic spelling -аја)",
      "name": "sh-suffix"
    }
  ],
  "lang": "Serbo-Croatian",
  "lang_code": "sh",
  "pos": "suffix",
  "related": [
    {
      "word": "-jaja"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages using catfix",
        "Pages with 2 entries",
        "Pages with entries",
        "Serbo-Croatian entries with incorrect language header",
        "Serbo-Croatian lemmas",
        "Serbo-Croatian suffixes",
        "Serbo-Croatian terms with unknown etymologies"
      ],
      "glosses": [
        "Suffix appended to nouns, adjectives or verbs to create a feminine noun."
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-aja"
}