"-hau" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "ine-pro",
        "3": "*seh₂g-"
      },
      "expansion": "",
      "name": "root"
    },
    {
      "args": {
        "1": "cy",
        "2": "cel-bry-pro",
        "3": "*-haɣjed"
      },
      "expansion": "Proto-Brythonic *-haɣjed",
      "name": "inh"
    },
    {
      "args": {
        "1": "cy",
        "2": "cel-pro",
        "3": "*-sagyetor",
        "pos": "causative/denominative suffix"
      },
      "expansion": "Proto-Celtic *-sagyetor (causative/denominative suffix)",
      "name": "inh"
    },
    {
      "args": {
        "1": "sga",
        "2": "-igidir"
      },
      "expansion": "Old Irish -igidir",
      "name": "cog"
    },
    {
      "args": {
        "1": "ga",
        "2": "-igh"
      },
      "expansion": "Irish -igh",
      "name": "cog"
    },
    {
      "args": {
        "1": "gv",
        "2": "-ee"
      },
      "expansion": "Manx -ee",
      "name": "cog"
    },
    {
      "args": {
        "1": "gd",
        "2": "-ich"
      },
      "expansion": "Scottish Gaelic -ich",
      "name": "cog"
    }
  ],
  "etymology_text": "Originally causative/denominative; from Proto-Brythonic *-haɣjed, from Proto-Celtic *-sagyetor (causative/denominative suffix). Cognate with Old Irish -igidir (Irish -igh, Manx -ee, Scottish Gaelic -ich).",
  "forms": [
    {
      "form": "-haf",
      "tags": [
        "first-person",
        "present",
        "singular"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "suffix",
        "3": "first-person singular present",
        "4": "-haf"
      },
      "expansion": "-hau (first-person singular present -haf)",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "creates a verbal noun from an adjectival root"
      ],
      "id": "en--hau-cy-suffix-aJA6teD-",
      "synonyms": [
        {
          "word": "-áu"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈhaɨ̯/",
      "tags": [
        "North-Wales"
      ]
    },
    {
      "ipa": "/ˈhai̯/",
      "tags": [
        "South-Wales"
      ]
    },
    {
      "rhymes": "-aɨ̯"
    }
  ],
  "word": "-hau"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "ine-pro",
        "3": "*seh₂g-"
      },
      "expansion": "",
      "name": "root"
    },
    {
      "args": {
        "1": "cy",
        "2": "cel-bry-pro",
        "3": "*-haɣjed"
      },
      "expansion": "Proto-Brythonic *-haɣjed",
      "name": "inh"
    },
    {
      "args": {
        "1": "cy",
        "2": "cel-pro",
        "3": "*-sagyetor",
        "pos": "causative/denominative suffix"
      },
      "expansion": "Proto-Celtic *-sagyetor (causative/denominative suffix)",
      "name": "inh"
    },
    {
      "args": {
        "1": "sga",
        "2": "-igidir"
      },
      "expansion": "Old Irish -igidir",
      "name": "cog"
    },
    {
      "args": {
        "1": "ga",
        "2": "-igh"
      },
      "expansion": "Irish -igh",
      "name": "cog"
    },
    {
      "args": {
        "1": "gv",
        "2": "-ee"
      },
      "expansion": "Manx -ee",
      "name": "cog"
    },
    {
      "args": {
        "1": "gd",
        "2": "-ich"
      },
      "expansion": "Scottish Gaelic -ich",
      "name": "cog"
    }
  ],
  "etymology_text": "Originally causative/denominative; from Proto-Brythonic *-haɣjed, from Proto-Celtic *-sagyetor (causative/denominative suffix). Cognate with Old Irish -igidir (Irish -igh, Manx -ee, Scottish Gaelic -ich).",
  "forms": [
    {
      "form": "-haf",
      "tags": [
        "first-person",
        "present",
        "singular"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "suffix",
        "3": "first-person singular present",
        "4": "-haf"
      },
      "expansion": "-hau (first-person singular present -haf)",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        "Rhymes:Welsh/aɨ̯",
        "Rhymes:Welsh/aɨ̯/1 syllable",
        "Welsh entries with incorrect language header",
        "Welsh lemmas",
        "Welsh suffixes",
        "Welsh terms derived from Proto-Brythonic",
        "Welsh terms derived from Proto-Celtic",
        "Welsh terms derived from Proto-Indo-European",
        "Welsh terms derived from the Proto-Indo-European root *seh₂g-",
        "Welsh terms inherited from Proto-Brythonic",
        "Welsh terms inherited from Proto-Celtic",
        "Welsh terms with IPA pronunciation"
      ],
      "glosses": [
        "creates a verbal noun from an adjectival root"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈhaɨ̯/",
      "tags": [
        "North-Wales"
      ]
    },
    {
      "ipa": "/ˈhai̯/",
      "tags": [
        "South-Wales"
      ]
    },
    {
      "rhymes": "-aɨ̯"
    }
  ],
  "synonyms": [
    {
      "word": "-áu"
    }
  ],
  "word": "-hau"
}