"sed-" meaning in Latin

{
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": "ine-pro",
        "3": "*swé",
        "t": "self"
      },
      "expansion": "Proto-Indo-European *swé (“self”)",
      "name": "inh"
    },
    {
      "args": {
        "1": "la",
        "2": "sē"
      },
      "expansion": "Doublet of sē",
      "name": "doublet"
    },
    {
      "args": {
        "1": "la",
        "2": "sed"
      },
      "expansion": "sed",
      "name": "m"
    }
  ],
  "etymology_text": "*s(w)ēd, the ablative singular of Proto-Indo-European *swé (“self”) lengthened under phrasal stress. Original form preserving the inherited /d/, which has been reinterpreted as hiatus-filler, but lost otherwise in all cases of long vowel preceding final /d/, such as other ablatives.\nDoublet of sē as well as sed, where the vowel shortened (or never lengthened).",
  "forms": [
    {
      "form": "sēd-",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "prefix",
        "head": "sēd-"
      },
      "expansion": "sēd-",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Latin entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "sēd- + itiō → sēditiō",
          "type": "example"
        }
      ],
      "glosses": [
        "Prevocalic form of sē-"
      ],
      "id": "en-sed--la-prefix-LD28CvSv",
      "links": [
        [
          "sē-",
          "se-#Latin"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "sed-"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "la",
        "2": "ine-pro",
        "3": "*swé",
        "t": "self"
      },
      "expansion": "Proto-Indo-European *swé (“self”)",
      "name": "inh"
    },
    {
      "args": {
        "1": "la",
        "2": "sē"
      },
      "expansion": "Doublet of sē",
      "name": "doublet"
    },
    {
      "args": {
        "1": "la",
        "2": "sed"
      },
      "expansion": "sed",
      "name": "m"
    }
  ],
  "etymology_text": "*s(w)ēd, the ablative singular of Proto-Indo-European *swé (“self”) lengthened under phrasal stress. Original form preserving the inherited /d/, which has been reinterpreted as hiatus-filler, but lost otherwise in all cases of long vowel preceding final /d/, such as other ablatives.\nDoublet of sē as well as sed, where the vowel shortened (or never lengthened).",
  "forms": [
    {
      "form": "sēd-",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "la",
        "2": "prefix",
        "head": "sēd-"
      },
      "expansion": "sēd-",
      "name": "head"
    }
  ],
  "lang": "Latin",
  "lang_code": "la",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "Latin doublets",
        "Latin entries with incorrect language header",
        "Latin lemmas",
        "Latin prefixes",
        "Latin terms derived from Proto-Indo-European",
        "Latin terms inherited from Proto-Indo-European"
      ],
      "examples": [
        {
          "text": "sēd- + itiō → sēditiō",
          "type": "example"
        }
      ],
      "glosses": [
        "Prevocalic form of sē-"
      ],
      "links": [
        [
          "sē-",
          "se-#Latin"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "sed-"
}