"di-" meaning in Sotho

{
  "etymology_templates": [
    {
      "args": {
        "1": "st",
        "2": "bnt-pro",
        "3": "*jí-"
      },
      "expansion": "Proto-Bantu *jí-",
      "name": "inh"
    },
    {
      "args": {
        "1": "bnt-pro",
        "2": "*bì-"
      },
      "expansion": "*bì-",
      "name": "m"
    }
  ],
  "etymology_text": "From Proto-Bantu *jí-. Originally the pronominal and verbal concord, it displaced the older Bantu noun prefix *bì-. The tone was lowered by analogy with other noun prefixes.",
  "head_templates": [
    {
      "args": {
        "1": "st",
        "2": "prefix",
        "cat2": "noun prefixes"
      },
      "expansion": "di-",
      "name": "head"
    }
  ],
  "lang": "Sotho",
  "lang_code": "st",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Sotho entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Class 8 noun prefix."
      ],
      "id": "en-di--st-prefix-alev6ztN",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "di-"
}

{
  "categories": [
    "West Makian entries with incorrect language header",
    "West Makian lemmas",
    "West Makian pronouns",
    "West Makian terms in nonstandard scripts"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "st",
        "2": "bnt-pro",
        "3": "*jí-"
      },
      "expansion": "Proto-Bantu *jí-",
      "name": "inh"
    },
    {
      "args": {
        "1": "bnt-pro",
        "2": "*bì-"
      },
      "expansion": "*bì-",
      "name": "m"
    }
  ],
  "etymology_text": "From Proto-Bantu *jí-. Originally the pronominal and verbal concord, it displaced the older Bantu noun prefix *bì-. The tone was lowered by analogy with other noun prefixes.",
  "head_templates": [
    {
      "args": {
        "1": "st",
        "2": "prefix",
        "cat2": "noun prefixes"
      },
      "expansion": "di-",
      "name": "head"
    }
  ],
  "lang": "Sotho",
  "lang_code": "st",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Sotho entries with incorrect language header",
        "Sotho lemmas",
        "Sotho noun prefixes",
        "Sotho prefixes",
        "Sotho terms derived from Proto-Bantu",
        "Sotho terms inherited from Proto-Bantu"
      ],
      "glosses": [
        "Class 8 noun prefix."
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "di-"
}