"-za" meaning in Swahili

{
  "etymology_text": "What are now vowel-final verb stems originally had an -l-, which resurfaces whenever a suffix is added. After addition of the suffix -ya, this -l- was then spirantized to -z-.",
  "head_templates": [
    {
      "args": {
        "1": "sw",
        "2": "suffix"
      },
      "expansion": "-za",
      "name": "head"
    }
  ],
  "lang": "Swahili",
  "lang_code": "sw",
  "pos": "suffix",
  "senses": [
    {
      "alt_of": [
        {
          "word": "-ya used after a vowel"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Swahili entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "Swahili causative verbs"
        }
      ],
      "examples": [
        {
          "text": "-kimbia (“to run”) + -za → -kimbiza (“to chase”)",
          "type": "example"
        },
        {
          "text": "-pungua (“to decrease”) + -za → -punguza (“to reduce”)",
          "type": "example"
        }
      ],
      "glosses": [
        "Alternative form of -ya used after a vowel"
      ],
      "id": "en--za-sw-suffix-JI69JmvH",
      "links": [
        [
          "-ya",
          "-ya#Swahili"
        ]
      ],
      "synonyms": [
        {
          "sense": "after a consonant",
          "word": "-ya"
        }
      ],
      "tags": [
        "alt-of",
        "alternative",
        "morpheme"
      ]
    }
  ],
  "word": "-za"
}

{
  "derived": [
    {
      "word": "Swahili causative verbs"
    }
  ],
  "etymology_text": "What are now vowel-final verb stems originally had an -l-, which resurfaces whenever a suffix is added. After addition of the suffix -ya, this -l- was then spirantized to -z-.",
  "head_templates": [
    {
      "args": {
        "1": "sw",
        "2": "suffix"
      },
      "expansion": "-za",
      "name": "head"
    }
  ],
  "lang": "Swahili",
  "lang_code": "sw",
  "pos": "suffix",
  "senses": [
    {
      "alt_of": [
        {
          "word": "-ya used after a vowel"
        }
      ],
      "categories": [
        "Pages with 2 entries",
        "Pages with entries",
        "Swahili entries with incorrect language header",
        "Swahili lemmas",
        "Swahili suffixes"
      ],
      "examples": [
        {
          "text": "-kimbia (“to run”) + -za → -kimbiza (“to chase”)",
          "type": "example"
        },
        {
          "text": "-pungua (“to decrease”) + -za → -punguza (“to reduce”)",
          "type": "example"
        }
      ],
      "glosses": [
        "Alternative form of -ya used after a vowel"
      ],
      "links": [
        [
          "-ya",
          "-ya#Swahili"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative",
        "morpheme"
      ]
    }
  ],
  "synonyms": [
    {
      "sense": "after a consonant",
      "word": "-ya"
    }
  ],
  "word": "-za"
}