"до-" meaning in Old Church Slavonic

{
  "etymology_templates": [
    {
      "args": {
        "1": "cu",
        "2": "sla-pro",
        "3": "*do"
      },
      "expansion": "Proto-Slavic *do",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Slavic *do.",
  "forms": [
    {
      "form": "do-",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cu",
        "2": "prefix"
      },
      "expansion": "до- • (do-)",
      "name": "head"
    }
  ],
  "lang": "Old Church Slavonic",
  "lang_code": "cu",
  "pos": "prefix",
  "related": [
    {
      "_dis1": "0 0 0",
      "english": "do",
      "word": "до"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "_dis": "44 47 10",
          "kind": "other",
          "name": "Old Church Slavonic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "до- (do-) + -ити (-iti, “to go”) → доити (doiti, “to go up to, to reach”)"
        }
      ],
      "glosses": [
        "up to"
      ],
      "id": "en-до--cu-prefix-nI2t5fTr",
      "links": [
        [
          "up to",
          "up to"
        ]
      ],
      "raw_glosses": [
        "(used with verbs) up to"
      ],
      "raw_tags": [
        "used with verbs"
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "categories": [
        {
          "_dis": "44 47 10",
          "kind": "other",
          "name": "Old Church Slavonic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "completely (describing a completion of an action to its end)"
      ],
      "id": "en-до--cu-prefix-8UieSer6",
      "links": [
        [
          "completely",
          "completely"
        ]
      ],
      "raw_glosses": [
        "(used with verbs) completely (describing a completion of an action to its end)"
      ],
      "raw_tags": [
        "used with verbs"
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "glosses": [
        "pre-, ante- (earlier in time)"
      ],
      "id": "en-до--cu-prefix-yeZp7yHR",
      "links": [
        [
          "pre-",
          "pre-"
        ],
        [
          "ante-",
          "ante-"
        ]
      ],
      "raw_glosses": [
        "(used with adjectives and nouns) pre-, ante- (earlier in time)"
      ],
      "raw_tags": [
        "used with adjectives and nouns"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "до-"
}

{
  "categories": [
    "Old Church Slavonic entries with incorrect language header",
    "Old Church Slavonic lemmas",
    "Old Church Slavonic prefixes",
    "Old Church Slavonic terms derived from Proto-Slavic",
    "Old Church Slavonic terms inherited from Proto-Slavic",
    "Pages with 4 entries",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "cu",
        "2": "sla-pro",
        "3": "*do"
      },
      "expansion": "Proto-Slavic *do",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Slavic *do.",
  "forms": [
    {
      "form": "do-",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cu",
        "2": "prefix"
      },
      "expansion": "до- • (do-)",
      "name": "head"
    }
  ],
  "lang": "Old Church Slavonic",
  "lang_code": "cu",
  "pos": "prefix",
  "related": [
    {
      "english": "do",
      "word": "до"
    }
  ],
  "senses": [
    {
      "examples": [
        {
          "text": "до- (do-) + -ити (-iti, “to go”) → доити (doiti, “to go up to, to reach”)"
        }
      ],
      "glosses": [
        "up to"
      ],
      "links": [
        [
          "up to",
          "up to"
        ]
      ],
      "raw_glosses": [
        "(used with verbs) up to"
      ],
      "raw_tags": [
        "used with verbs"
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "glosses": [
        "completely (describing a completion of an action to its end)"
      ],
      "links": [
        [
          "completely",
          "completely"
        ]
      ],
      "raw_glosses": [
        "(used with verbs) completely (describing a completion of an action to its end)"
      ],
      "raw_tags": [
        "used with verbs"
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "glosses": [
        "pre-, ante- (earlier in time)"
      ],
      "links": [
        [
          "pre-",
          "pre-"
        ],
        [
          "ante-",
          "ante-"
        ]
      ],
      "raw_glosses": [
        "(used with adjectives and nouns) pre-, ante- (earlier in time)"
      ],
      "raw_tags": [
        "used with adjectives and nouns"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "до-"
}