"по-" meaning in Old Church Slavonic

{
  "etymology_templates": [
    {
      "args": {
        "1": "cu",
        "2": "sla-pro",
        "3": "*po-"
      },
      "expansion": "Proto-Slavic *po-",
      "name": "inh"
    },
    {
      "args": {
        "1": "cu",
        "2": "sla-pro",
        "3": "*po"
      },
      "expansion": "Proto-Slavic *po",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Slavic *po- prefix, from Proto-Slavic *po.",
  "forms": [
    {
      "form": "po-",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cu",
        "2": "prefix"
      },
      "expansion": "по- • (po-)",
      "name": "head"
    }
  ],
  "lang": "Old Church Slavonic",
  "lang_code": "cu",
  "pos": "prefix",
  "related": [
    {
      "_dis1": "0 0 0",
      "roman": "po",
      "word": "по"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "_dis": "47 7 46",
          "kind": "other",
          "name": "Old Church Slavonic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A prefix indicating the perfective aspect."
      ],
      "id": "en-по--cu-prefix-wyUdRfkD",
      "tags": [
        "morpheme"
      ]
    },
    {
      "examples": [
        {
          "text": "по- (po-) + говорити impf (govoriti, “to talk”) → поговорити pf (pogovoriti, “to have a talk, to talk a little”)"
        }
      ],
      "glosses": [
        "for a while, a little (see delimitative aspect)"
      ],
      "id": "en-по--cu-prefix-EdrjLCix",
      "links": [
        [
          "while",
          "while"
        ],
        [
          "a little",
          "a little"
        ],
        [
          "delimitative aspect",
          "w:delimitative aspect"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "categories": [
        {
          "_dis": "47 7 46",
          "kind": "other",
          "name": "Old Church Slavonic entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "по- (po-) + морѥ (morje, “the Sea”) + -ье (-ĭe) → поморѥ (pomorje, “costal region”)"
        },
        {
          "text": "по- (po-) + Морава (Morava, “the Morava River”) → поморавиѥ (pomoravije, “Morava region”)"
        }
      ],
      "glosses": [
        "place names"
      ],
      "id": "en-по--cu-prefix-4mdYNCQn",
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "по-"
}

{
  "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"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "cu",
        "2": "sla-pro",
        "3": "*po-"
      },
      "expansion": "Proto-Slavic *po-",
      "name": "inh"
    },
    {
      "args": {
        "1": "cu",
        "2": "sla-pro",
        "3": "*po"
      },
      "expansion": "Proto-Slavic *po",
      "name": "inh"
    }
  ],
  "etymology_text": "From Proto-Slavic *po- prefix, from Proto-Slavic *po.",
  "forms": [
    {
      "form": "po-",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "cu",
        "2": "prefix"
      },
      "expansion": "по- • (po-)",
      "name": "head"
    }
  ],
  "lang": "Old Church Slavonic",
  "lang_code": "cu",
  "pos": "prefix",
  "related": [
    {
      "roman": "po",
      "word": "по"
    }
  ],
  "senses": [
    {
      "glosses": [
        "A prefix indicating the perfective aspect."
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "examples": [
        {
          "text": "по- (po-) + говорити impf (govoriti, “to talk”) → поговорити pf (pogovoriti, “to have a talk, to talk a little”)"
        }
      ],
      "glosses": [
        "for a while, a little (see delimitative aspect)"
      ],
      "links": [
        [
          "while",
          "while"
        ],
        [
          "a little",
          "a little"
        ],
        [
          "delimitative aspect",
          "w:delimitative aspect"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    },
    {
      "examples": [
        {
          "text": "по- (po-) + морѥ (morje, “the Sea”) + -ье (-ĭe) → поморѥ (pomorje, “costal region”)"
        },
        {
          "text": "по- (po-) + Морава (Morava, “the Morava River”) → поморавиѥ (pomoravije, “Morava region”)"
        }
      ],
      "glosses": [
        "place names"
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "word": "по-"
}