"ys" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "ine-pro",
        "3": "*h₁ésti"
      },
      "expansion": "Proto-Indo-European *h₁ésti",
      "name": "inh"
    },
    {
      "args": {
        "1": "sga",
        "2": "is"
      },
      "expansion": "Old Irish is",
      "name": "cog"
    }
  ],
  "etymology_text": "From Proto-Indo-European *h₁ésti, a form of *h₁es-; compare Old Irish is.",
  "head_templates": [
    {
      "args": {},
      "expansion": "ys",
      "name": "cy-verb form"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 9 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "bod"
        }
      ],
      "glosses": [
        "impersonal present progressive of bod"
      ],
      "id": "en-ys-cy-verb-desj6vJH",
      "links": [
        [
          "bod",
          "bod#Welsh"
        ]
      ],
      "raw_glosses": [
        "(literary) impersonal present progressive of bod"
      ],
      "synonyms": [
        {
          "word": "ydys"
        }
      ],
      "tags": [
        "form-of",
        "impersonal",
        "literary",
        "present",
        "progressive"
      ]
    }
  ],
  "word": "ys"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "ine-pro",
        "3": "*h₁ésti"
      },
      "expansion": "Proto-Indo-European *h₁ésti",
      "name": "inh"
    },
    {
      "args": {
        "1": "sga",
        "2": "is"
      },
      "expansion": "Old Irish is",
      "name": "cog"
    }
  ],
  "etymology_text": "From Proto-Indo-European *h₁ésti, a form of *h₁es-; compare Old Irish is.",
  "head_templates": [
    {
      "args": {},
      "expansion": "ys",
      "name": "cy-verb form"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Pages with 9 entries",
        "Pages with entries",
        "Welsh entries with incorrect language header",
        "Welsh literary terms",
        "Welsh non-lemma forms",
        "Welsh terms derived from Proto-Indo-European",
        "Welsh terms inherited from Proto-Indo-European",
        "Welsh verb forms"
      ],
      "form_of": [
        {
          "word": "bod"
        }
      ],
      "glosses": [
        "impersonal present progressive of bod"
      ],
      "links": [
        [
          "bod",
          "bod#Welsh"
        ]
      ],
      "raw_glosses": [
        "(literary) impersonal present progressive of bod"
      ],
      "tags": [
        "form-of",
        "impersonal",
        "literary",
        "present",
        "progressive"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "ydys"
    }
  ],
  "word": "ys"
}