"-îsa" meaning in Phuthi

{
  "head_templates": [
    {
      "args": {
        "1": "bnt-phu",
        "2": "suffix",
        "cat2": "verb-forming suffixes"
      },
      "expansion": "-îsa",
      "name": "head"
    }
  ],
  "lang": "Phuthi",
  "lang_code": "bnt-phu",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Phuthi entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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      ],
      "glosses": [
        "Forms causative verbs; form of -isa used with stems containing superclose vowels."
      ],
      "id": "en--îsa-bnt-phu-suffix-0r8CWuIK",
      "links": [
        [
          "-isa",
          "-isa#Phuthi"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-îsa"
}

{
  "head_templates": [
    {
      "args": {
        "1": "bnt-phu",
        "2": "suffix",
        "cat2": "verb-forming suffixes"
      },
      "expansion": "-îsa",
      "name": "head"
    }
  ],
  "lang": "Phuthi",
  "lang_code": "bnt-phu",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Phuthi entries with incorrect language header",
        "Phuthi lemmas",
        "Phuthi suffixes",
        "Phuthi verb-forming suffixes"
      ],
      "glosses": [
        "Forms causative verbs; form of -isa used with stems containing superclose vowels."
      ],
      "links": [
        [
          "-isa",
          "-isa#Phuthi"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-îsa"
}