"sir-" meaning in Proto-Japonic

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "ojp",
            "2": "知る",
            "tr": "siru"
          },
          "expansion": "Old Japanese: 知る (siru)",
          "name": "desc"
        }
      ],
      "text": "Old Japanese: 知る (siru)"
    },
    {
      "depth": 2,
      "templates": [
        {
          "args": {
            "1": "ja",
            "2": "知る",
            "tr": "shiru"
          },
          "expansion": "Japanese: 知る (shiru)",
          "name": "desc"
        }
      ],
      "text": "Japanese: 知る (shiru)"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "jpx-ryu-pro",
            "2": "*siri"
          },
          "expansion": "Proto-Ryukyuan: *siri\nNorthern Ryukyuan:\nKunigami: 知ん (shin) (only used as a suffix)\nNorthern Amami Ōshima: 知るり (shiruri)\nOkinawan: 知ゆん (shiyun)\nYoron: 知っちゅん (shitchun) (< *sir-i-t-e-wori)\nSouthern Ryukyuan:\nMiyako: 知 (ssï)\nYaeyama: 知すん (sïsun)\nYonaguni: 知ん (chun)",
          "name": "desctree"
        }
      ],
      "text": "Proto-Ryukyuan: *siri\nNorthern Ryukyuan:\nKunigami: 知ん (shin) (only used as a suffix)\nNorthern Amami Ōshima: 知るり (shiruri)\nOkinawan: 知ゆん (shiyun)\nYoron: 知っちゅん (shitchun) (< *sir-i-t-e-wori)\nSouthern Ryukyuan:\nMiyako: 知 (ssï)\nYaeyama: 知すん (sïsun)\nYonaguni: 知ん (chun)"
    }
  ],
  "forms": [
    {
      "form": "siri",
      "tags": [
        "infinitive"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "jpx-pro",
        "2": "verb",
        "3": "infinitive",
        "4": "*siri"
      },
      "expansion": "*sir- (infinitive *siri)",
      "name": "head"
    }
  ],
  "lang": "Proto-Japonic",
  "lang_code": "jpx-pro",
  "original_title": "Reconstruction:Proto-Japonic/sir-",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Proto-Japonic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "to know, to gain knowledge about"
      ],
      "id": "en-sir--jpx-pro-verb-8jtXulP1",
      "links": [
        [
          "know",
          "know"
        ],
        [
          "knowledge",
          "knowledge"
        ]
      ],
      "tags": [
        "reconstruction"
      ]
    }
  ],
  "word": "sir-"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "ojp",
            "2": "知る",
            "tr": "siru"
          },
          "expansion": "Old Japanese: 知る (siru)",
          "name": "desc"
        }
      ],
      "text": "Old Japanese: 知る (siru)"
    },
    {
      "depth": 2,
      "templates": [
        {
          "args": {
            "1": "ja",
            "2": "知る",
            "tr": "shiru"
          },
          "expansion": "Japanese: 知る (shiru)",
          "name": "desc"
        }
      ],
      "text": "Japanese: 知る (shiru)"
    },
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "jpx-ryu-pro",
            "2": "*siri"
          },
          "expansion": "Proto-Ryukyuan: *siri\nNorthern Ryukyuan:\nKunigami: 知ん (shin) (only used as a suffix)\nNorthern Amami Ōshima: 知るり (shiruri)\nOkinawan: 知ゆん (shiyun)\nYoron: 知っちゅん (shitchun) (< *sir-i-t-e-wori)\nSouthern Ryukyuan:\nMiyako: 知 (ssï)\nYaeyama: 知すん (sïsun)\nYonaguni: 知ん (chun)",
          "name": "desctree"
        }
      ],
      "text": "Proto-Ryukyuan: *siri\nNorthern Ryukyuan:\nKunigami: 知ん (shin) (only used as a suffix)\nNorthern Amami Ōshima: 知るり (shiruri)\nOkinawan: 知ゆん (shiyun)\nYoron: 知っちゅん (shitchun) (< *sir-i-t-e-wori)\nSouthern Ryukyuan:\nMiyako: 知 (ssï)\nYaeyama: 知すん (sïsun)\nYonaguni: 知ん (chun)"
    }
  ],
  "forms": [
    {
      "form": "siri",
      "tags": [
        "infinitive"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "jpx-pro",
        "2": "verb",
        "3": "infinitive",
        "4": "*siri"
      },
      "expansion": "*sir- (infinitive *siri)",
      "name": "head"
    }
  ],
  "lang": "Proto-Japonic",
  "lang_code": "jpx-pro",
  "original_title": "Reconstruction:Proto-Japonic/sir-",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Pages with entries",
        "Proto-Japonic entries with incorrect language header",
        "Proto-Japonic lemmas",
        "Proto-Japonic verbs",
        "jpx-pro:Mind"
      ],
      "glosses": [
        "to know, to gain knowledge about"
      ],
      "links": [
        [
          "know",
          "know"
        ],
        [
          "knowledge",
          "knowledge"
        ]
      ],
      "tags": [
        "reconstruction"
      ]
    }
  ],
  "word": "sir-"
}