"rhiw" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "Carew"
      },
      "expansion": "Carew",
      "name": "m"
    },
    {
      "args": {
        "1": "kw",
        "2": "-rew"
      },
      "expansion": "-rew",
      "name": "m"
    }
  ],
  "etymology_text": "Usually attested in placenames, such as Carew, parallel to the Cornish suffix -rew, but of obscure origin.",
  "forms": [
    {
      "form": "rhiwiau",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "cy-mut",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "rhiw",
      "source": "mutation",
      "tags": [
        "mutation",
        "mutation-radical"
      ]
    },
    {
      "form": "riw",
      "source": "mutation",
      "tags": [
        "mutation",
        "mutation-soft"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mf",
        "2": "rhiwiau"
      },
      "expansion": "rhiw m or f (plural rhiwiau)",
      "name": "cy-noun"
    }
  ],
  "inflection_templates": [
    {
      "args": {},
      "name": "cy-mut"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "cy",
          "name": "Geography",
          "orig": "cy:Geography",
          "parents": [
            "Earth sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "slope, hill"
      ],
      "id": "en-rhiw-cy-noun-A6-UUUA1",
      "links": [
        [
          "slope",
          "slope"
        ],
        [
          "hill",
          "hill"
        ]
      ],
      "tags": [
        "feminine",
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/r̥ɪu̯/"
    },
    {
      "rhymes": "-ɪu̯"
    }
  ],
  "word": "rhiw"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "Carew"
      },
      "expansion": "Carew",
      "name": "m"
    },
    {
      "args": {
        "1": "kw",
        "2": "-rew"
      },
      "expansion": "-rew",
      "name": "m"
    }
  ],
  "etymology_text": "Usually attested in placenames, such as Carew, parallel to the Cornish suffix -rew, but of obscure origin.",
  "forms": [
    {
      "form": "rhiwiau",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "no-table-tags",
      "source": "mutation",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "cy-mut",
      "source": "mutation",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "rhiw",
      "source": "mutation",
      "tags": [
        "mutation",
        "mutation-radical"
      ]
    },
    {
      "form": "riw",
      "source": "mutation",
      "tags": [
        "mutation",
        "mutation-soft"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "mf",
        "2": "rhiwiau"
      },
      "expansion": "rhiw m or f (plural rhiwiau)",
      "name": "cy-noun"
    }
  ],
  "inflection_templates": [
    {
      "args": {},
      "name": "cy-mut"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Rhymes:Welsh/ɪu̯",
        "Welsh countable nouns",
        "Welsh entries with incorrect language header",
        "Welsh entries with topic categories using raw markup",
        "Welsh feminine nouns",
        "Welsh lemmas",
        "Welsh masculine nouns",
        "Welsh nouns",
        "Welsh nouns with multiple genders",
        "Welsh nouns with red links in their headword lines",
        "Welsh terms with IPA pronunciation",
        "Welsh terms with non-redundant non-automated sortkeys",
        "cy:Geography"
      ],
      "glosses": [
        "slope, hill"
      ],
      "links": [
        [
          "slope",
          "slope"
        ],
        [
          "hill",
          "hill"
        ]
      ],
      "tags": [
        "feminine",
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/r̥ɪu̯/"
    },
    {
      "rhymes": "-ɪu̯"
    }
  ],
  "word": "rhiw"
}