"-io" meaning in Welsh

{
  "etymology_text": "Variant of -o, initially after a stem that contained /j/ (for Brythonic /ɣ/ or from palatalization after a diphthong), later extended to other verbstems.",
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "suffix"
      },
      "expansion": "-io",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "suffix",
  "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": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Forms verbnouns from verbs and other parts of speech."
      ],
      "id": "en--io-cy-suffix-SyXMJ4lI",
      "links": [
        [
          "verbnouns",
          "w:Verbnoun"
        ]
      ],
      "related": [
        {
          "alt": "Forms verbnouns from verb stems ending in i̯",
          "word": "-o"
        }
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/jɔ/"
    }
  ],
  "word": "-io"
}

{
  "etymology_text": "Variant of -o, initially after a stem that contained /j/ (for Brythonic /ɣ/ or from palatalization after a diphthong), later extended to other verbstems.",
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "suffix"
      },
      "expansion": "-io",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "suffix",
  "related": [
    {
      "alt": "Forms verbnouns from verb stems ending in i̯",
      "word": "-o"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 9 entries",
        "Pages with entries",
        "Welsh entries with incorrect language header",
        "Welsh lemmas",
        "Welsh suffixes"
      ],
      "glosses": [
        "Forms verbnouns from verbs and other parts of speech."
      ],
      "links": [
        [
          "verbnouns",
          "w:Verbnoun"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/jɔ/"
    }
  ],
  "word": "-io"
}