"-gu" meaning in Turkish

{
  "etymology_templates": [
    {
      "args": {
        "1": "tr",
        "2": "ota",
        "3": "ـگی",
        "tr": "-gi"
      },
      "expansion": "Ottoman Turkish ـگی (-gi)",
      "name": "inh"
    },
    {
      "args": {
        "1": "tr",
        "2": "trk-oat",
        "3": "ـکو",
        "tr": "-gü"
      },
      "expansion": "Old Anatolian Turkish ـکو (-gü)",
      "name": "inh"
    },
    {
      "args": {
        "1": "tr",
        "2": "trk-pro",
        "3": "*-gü"
      },
      "expansion": "Proto-Turkic *-gü",
      "name": "inh"
    }
  ],
  "etymology_text": "From Ottoman Turkish ـگی (-gi), from Old Anatolian Turkish ـکو (-gü), from Proto-Turkic *-gü.",
  "head_templates": [
    {
      "args": {
        "1": "tr",
        "2": "suffix",
        "3": "",
        "4": "-{{{var}}}",
        "head": ""
      },
      "expansion": "-gu",
      "name": "head"
    },
    {
      "args": {
        "1": "noun"
      },
      "expansion": "-gu",
      "name": "tr-suffix"
    }
  ],
  "lang": "Turkish",
  "lang_code": "tr",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 8 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Turkish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "bulmak (“to find”) + -gu → bulgu (“finding”)"
        },
        {
          "text": "sormak (“to ask”) + -gu → sorgu (“interrogation”)"
        },
        {
          "text": "duymak (“to feel, to hear”) + -gu → duygu (“emotion”)"
        }
      ],
      "glosses": [
        "Suffix creating a new noun related to its root."
      ],
      "id": "en--gu-tr-suffix-y6ysWmuB",
      "synonyms": [
        {
          "word": "-gı"
        },
        {
          "word": "-gi"
        },
        {
          "word": "-gü"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "-gu"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "tr",
        "2": "ota",
        "3": "ـگی",
        "tr": "-gi"
      },
      "expansion": "Ottoman Turkish ـگی (-gi)",
      "name": "inh"
    },
    {
      "args": {
        "1": "tr",
        "2": "trk-oat",
        "3": "ـکو",
        "tr": "-gü"
      },
      "expansion": "Old Anatolian Turkish ـکو (-gü)",
      "name": "inh"
    },
    {
      "args": {
        "1": "tr",
        "2": "trk-pro",
        "3": "*-gü"
      },
      "expansion": "Proto-Turkic *-gü",
      "name": "inh"
    }
  ],
  "etymology_text": "From Ottoman Turkish ـگی (-gi), from Old Anatolian Turkish ـکو (-gü), from Proto-Turkic *-gü.",
  "head_templates": [
    {
      "args": {
        "1": "tr",
        "2": "suffix",
        "3": "",
        "4": "-{{{var}}}",
        "head": ""
      },
      "expansion": "-gu",
      "name": "head"
    },
    {
      "args": {
        "1": "noun"
      },
      "expansion": "-gu",
      "name": "tr-suffix"
    }
  ],
  "lang": "Turkish",
  "lang_code": "tr",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Pages with 8 entries",
        "Pages with entries",
        "Turkish entries with incorrect language header",
        "Turkish lemmas",
        "Turkish noun-forming suffixes",
        "Turkish suffixes",
        "Turkish terms derived from Old Anatolian Turkish",
        "Turkish terms derived from Ottoman Turkish",
        "Turkish terms derived from Proto-Turkic",
        "Turkish terms inherited from Old Anatolian Turkish",
        "Turkish terms inherited from Ottoman Turkish",
        "Turkish terms inherited from Proto-Turkic"
      ],
      "examples": [
        {
          "text": "bulmak (“to find”) + -gu → bulgu (“finding”)"
        },
        {
          "text": "sormak (“to ask”) + -gu → sorgu (“interrogation”)"
        },
        {
          "text": "duymak (“to feel, to hear”) + -gu → duygu (“emotion”)"
        }
      ],
      "glosses": [
        "Suffix creating a new noun related to its root."
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "-gı"
    },
    {
      "word": "-gi"
    },
    {
      "word": "-gü"
    }
  ],
  "word": "-gu"
}