"Rha" meaning in Latin

{
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": ":bor",
        "3": "grc:Ῥᾶ",
        "text": "+",
        "title": "Rha",
        "tree": "1"
      },
      "expansion": "Etymology tree\nAncient Greek Ῥᾶ (Rhâ)bor.\nLatin Rha\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Ancient Greek\", \"term\" : \"Ῥᾶ\", \"status\" : \"missing\", \"lang\" : \"grc\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"Latin\", \"term\" : \"Rha\", \"status\" : \"ok\", \"lang\" : \"la\" }\" data-lang=\"la\" data-title=\"Rha\">\nBorrowed from Ancient Greek Ῥᾶ (Rhâ).",
      "name": "ety"
    }
  ],
  "etymology_text": "Etymology tree\nAncient Greek Ῥᾶ (Rhâ)bor.\nLatin Rha\nBorrowed from Ancient Greek Ῥᾶ (Rhâ).",
  "head_templates": [
    {
      "args": {
        "1": "Rha",
        "g": "m",
        "indecl": "1"
      },
      "expansion": "Rha m (indeclinable)",
      "name": "la-proper noun"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Latin entries referencing missing etymons",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Latin entries with etymology texts",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Latin entries with etymology trees",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages using etymon with no ID",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with etymology trees",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "la",
          "name": "Rivers",
          "orig": "la:Rivers",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "a river in Sarmatia, now the Volga"
      ],
      "id": "en-Rha-la-name-q2XbTvUT",
      "links": [
        [
          "river",
          "river"
        ],
        [
          "Sarmatia",
          "Sarmatia#English"
        ],
        [
          "Volga",
          "Volga"
        ]
      ],
      "tags": [
        "indeclinable",
        "masculine"
      ]
    }
  ],
  "word": "Rha"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": ":bor",
        "3": "grc:Ῥᾶ",
        "text": "+",
        "title": "Rha",
        "tree": "1"
      },
      "expansion": "Etymology tree\nAncient Greek Ῥᾶ (Rhâ)bor.\nLatin Rha\n[Appendix:Glossary#loanword|Borrowed]] from\", \"terms\" : [ { \"children\" : [ ], \"lang_name\" : \"Ancient Greek\", \"term\" : \"Ῥᾶ\", \"status\" : \"missing\", \"lang\" : \"grc\" } ], \"keyword\" : \"bor\" } ], \"lang_name\" : \"Latin\", \"term\" : \"Rha\", \"status\" : \"ok\", \"lang\" : \"la\" }\" data-lang=\"la\" data-title=\"Rha\">\nBorrowed from Ancient Greek Ῥᾶ (Rhâ).",
      "name": "ety"
    }
  ],
  "etymology_text": "Etymology tree\nAncient Greek Ῥᾶ (Rhâ)bor.\nLatin Rha\nBorrowed from Ancient Greek Ῥᾶ (Rhâ).",
  "head_templates": [
    {
      "args": {
        "1": "Rha",
        "g": "m",
        "indecl": "1"
      },
      "expansion": "Rha m (indeclinable)",
      "name": "la-proper noun"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "Latin entries referencing missing etymons",
        "Latin entries with etymology texts",
        "Latin entries with etymology trees",
        "Latin entries with incorrect language header",
        "Latin indeclinable nouns",
        "Latin lemmas",
        "Latin masculine indeclinable nouns",
        "Latin masculine nouns",
        "Latin proper nouns",
        "Latin terms borrowed from Ancient Greek",
        "Latin terms derived from Ancient Greek",
        "Pages using etymon with no ID",
        "Pages with 2 entries",
        "Pages with entries",
        "Pages with etymology trees",
        "la:Rivers"
      ],
      "glosses": [
        "a river in Sarmatia, now the Volga"
      ],
      "links": [
        [
          "river",
          "river"
        ],
        [
          "Sarmatia",
          "Sarmatia#English"
        ],
        [
          "Volga",
          "Volga"
        ]
      ],
      "tags": [
        "indeclinable",
        "masculine"
      ]
    }
  ],
  "word": "Rha"
}