"-mest" meaning in Old English

{
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    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "en",
            "2": "-most"
          },
          "expansion": "English: -most",
          "name": "desc"
        }
      ],
      "text": "English: -most"
    }
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    {
      "args": {
        "1": "ang",
        "2": "gem-pro",
        "3": "*-umistaz"
      },
      "expansion": "Proto-Germanic *-umistaz",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Germanic *-umistaz, from the comparative suffix *-umô + the regular superlative suffix *-istaz",
  "head_templates": [
    {
      "args": {
        "1": "ang",
        "2": "suffix",
        "cat2": "",
        "head": "",
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      "expansion": "-mest",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "-mest",
      "name": "ang-suffix"
    }
  ],
  "lang": "Old English",
  "lang_code": "ang",
  "pos": "suffix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Old English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "west (“west”) + -mest → westmest (“westernmost”)",
          "type": "example"
        }
      ],
      "glosses": [
        "-most; used to form the superlative of certain words, such as cardinal directions"
      ],
      "id": "en--mest-ang-suffix-D67HjxOS",
      "links": [
        [
          "-most",
          "-most"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/mes/"
    }
  ],
  "word": "-mest"
}

{
  "descendants": [
    {
      "depth": 1,
      "templates": [
        {
          "args": {
            "1": "en",
            "2": "-most"
          },
          "expansion": "English: -most",
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      ],
      "text": "English: -most"
    }
  ],
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    {
      "args": {
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        "2": "gem-pro",
        "3": "*-umistaz"
      },
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      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Germanic *-umistaz, from the comparative suffix *-umô + the regular superlative suffix *-istaz",
  "head_templates": [
    {
      "args": {
        "1": "ang",
        "2": "suffix",
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      "expansion": "-mest",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "-mest",
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  ],
  "lang": "Old English",
  "lang_code": "ang",
  "pos": "suffix",
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      "categories": [
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        "Old English terms with IPA pronunciation",
        "Pages with 1 entry"
      ],
      "examples": [
        {
          "text": "west (“west”) + -mest → westmest (“westernmost”)",
          "type": "example"
        }
      ],
      "glosses": [
        "-most; used to form the superlative of certain words, such as cardinal directions"
      ],
      "links": [
        [
          "-most",
          "-most"
        ]
      ],
      "tags": [
        "morpheme"
      ]
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  ],
  "sounds": [
    {
      "ipa": "/mes/"
    }
  ],
  "word": "-mest"
}