"hy-" meaning in Welsh

{
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "wlm",
        "3": "hy-"
      },
      "expansion": "Middle Welsh hy-",
      "name": "inh"
    },
    {
      "args": {
        "1": "cy",
        "2": "owl",
        "3": "hi-"
      },
      "expansion": "Old Welsh hi-",
      "name": "inh"
    },
    {
      "args": {
        "1": "cy",
        "2": "cel-bry-pro",
        "3": "*hu-"
      },
      "expansion": "Proto-Brythonic *hu-",
      "name": "inh"
    },
    {
      "args": {
        "1": "cy",
        "2": "cel-pro",
        "3": "*su-"
      },
      "expansion": "Proto-Celtic *su-",
      "name": "inh"
    },
    {
      "args": {
        "1": "cy",
        "2": "ine-pro",
        "3": "*h₁su-",
        "4": "",
        "5": "good"
      },
      "expansion": "Proto-Indo-European *h₁su- (“good”)",
      "name": "inh"
    },
    {
      "args": {
        "1": "kw",
        "2": "he-"
      },
      "expansion": "Cornish he-",
      "name": "cog"
    },
    {
      "args": {
        "1": "grc",
        "2": "εὐ-",
        "3": "",
        "4": "good"
      },
      "expansion": "Ancient Greek εὐ- (eu-, “good”)",
      "name": "cog"
    }
  ],
  "etymology_text": "From Middle Welsh hy-, from Old Welsh hi-, from Proto-Brythonic *hu-, from Proto-Celtic *su-, from Proto-Indo-European *h₁su- (“good”). Cognate with Cornish he- and Ancient Greek εὐ- (eu-, “good”).",
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "prefix"
      },
      "expansion": "hy-",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "_dis": "57 43",
          "kind": "other",
          "name": "Welsh entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "hy- + rhwydd (“easy”) → hyrwydd (“very easy”)",
          "type": "example"
        },
        {
          "text": "hy- + glân (“clean”) → hylan (“hygienic”)",
          "type": "example"
        }
      ],
      "glosses": [
        "affirmative prefix, emphasises prefixed word"
      ],
      "id": "en-hy--cy-prefix-QF~w6svS",
      "tags": [
        "morpheme"
      ]
    },
    {
      "examples": [
        {
          "text": "hy- + plyg (“folded”) → hyblyg (“flexible”)",
          "type": "example"
        },
        {
          "text": "hy- + byw (“alive”) → hyfyw (“viable”)",
          "type": "example"
        }
      ],
      "glosses": [
        "added to verbal roots, indicates 'easy to X', 'X-able'"
      ],
      "id": "en-hy--cy-prefix-HsanC9Y8",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/hə/"
    }
  ],
  "synonyms": [
    {
      "_dis1": "0 0",
      "word": "hu-"
    }
  ],
  "word": "hy-"
}

{
  "categories": [
    "Welsh entries with incorrect language header",
    "Welsh lemmas",
    "Welsh prefixes",
    "Welsh terms derived from Middle Welsh",
    "Welsh terms derived from Old Welsh",
    "Welsh terms derived from Proto-Brythonic",
    "Welsh terms derived from Proto-Celtic",
    "Welsh terms derived from Proto-Indo-European",
    "Welsh terms inherited from Middle Welsh",
    "Welsh terms inherited from Old Welsh",
    "Welsh terms inherited from Proto-Brythonic",
    "Welsh terms inherited from Proto-Celtic",
    "Welsh terms inherited from Proto-Indo-European",
    "Welsh terms with IPA pronunciation"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "cy",
        "2": "wlm",
        "3": "hy-"
      },
      "expansion": "Middle Welsh hy-",
      "name": "inh"
    },
    {
      "args": {
        "1": "cy",
        "2": "owl",
        "3": "hi-"
      },
      "expansion": "Old Welsh hi-",
      "name": "inh"
    },
    {
      "args": {
        "1": "cy",
        "2": "cel-bry-pro",
        "3": "*hu-"
      },
      "expansion": "Proto-Brythonic *hu-",
      "name": "inh"
    },
    {
      "args": {
        "1": "cy",
        "2": "cel-pro",
        "3": "*su-"
      },
      "expansion": "Proto-Celtic *su-",
      "name": "inh"
    },
    {
      "args": {
        "1": "cy",
        "2": "ine-pro",
        "3": "*h₁su-",
        "4": "",
        "5": "good"
      },
      "expansion": "Proto-Indo-European *h₁su- (“good”)",
      "name": "inh"
    },
    {
      "args": {
        "1": "kw",
        "2": "he-"
      },
      "expansion": "Cornish he-",
      "name": "cog"
    },
    {
      "args": {
        "1": "grc",
        "2": "εὐ-",
        "3": "",
        "4": "good"
      },
      "expansion": "Ancient Greek εὐ- (eu-, “good”)",
      "name": "cog"
    }
  ],
  "etymology_text": "From Middle Welsh hy-, from Old Welsh hi-, from Proto-Brythonic *hu-, from Proto-Celtic *su-, from Proto-Indo-European *h₁su- (“good”). Cognate with Cornish he- and Ancient Greek εὐ- (eu-, “good”).",
  "head_templates": [
    {
      "args": {
        "1": "cy",
        "2": "prefix"
      },
      "expansion": "hy-",
      "name": "head"
    }
  ],
  "lang": "Welsh",
  "lang_code": "cy",
  "pos": "prefix",
  "senses": [
    {
      "examples": [
        {
          "text": "hy- + rhwydd (“easy”) → hyrwydd (“very easy”)",
          "type": "example"
        },
        {
          "text": "hy- + glân (“clean”) → hylan (“hygienic”)",
          "type": "example"
        }
      ],
      "glosses": [
        "affirmative prefix, emphasises prefixed word"
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "examples": [
        {
          "text": "hy- + plyg (“folded”) → hyblyg (“flexible”)",
          "type": "example"
        },
        {
          "text": "hy- + byw (“alive”) → hyfyw (“viable”)",
          "type": "example"
        }
      ],
      "glosses": [
        "added to verbal roots, indicates 'easy to X', 'X-able'"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/hə/"
    }
  ],
  "synonyms": [
    {
      "word": "hu-"
    }
  ],
  "word": "hy-"
}