"-a-" meaning in Chichewa

{
  "head_templates": [
    {
      "args": {
        "1": "ny",
        "2": "infix"
      },
      "expansion": "-a-",
      "name": "head"
    }
  ],
  "lang": "Chichewa",
  "lang_code": "ny",
  "pos": "infix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Chichewa entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Chichewa infixes",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Forms the past perfect tense in verbs."
      ],
      "id": "en--a--ny-infix-7CNN-FTY",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-a-"
}

{
  "head_templates": [
    {
      "args": {
        "1": "ny",
        "2": "infix"
      },
      "expansion": "-a-",
      "name": "head"
    }
  ],
  "lang": "Chichewa",
  "lang_code": "ny",
  "pos": "infix",
  "senses": [
    {
      "categories": [
        "Chichewa entries with incorrect language header",
        "Chichewa infixes",
        "Chichewa lemmas"
      ],
      "glosses": [
        "Forms the past perfect tense in verbs."
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-a-"
}